US3926906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental filling package
Assignee: Johnson and Johnson
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Filing: 1970-10-15
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Granted: 1975-12-16
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Expires: 1990-10-15
Abstract
Abstract Direct dental filling materials utilizing a crosslinkable binder system and finely divided inorganic filler are packaged as two component systems with each of the two package components containing an intimate mix of unpolymerized resin binder and inorganic filler in the proportions in which they will be present in the cured dental filling. The contents of the two package components are essentially the same with the exception that one package component contains together with the resin binder and filler, an accelerator for the resin binder and the other package component contains a catalyst for the resin binder. In preparing a filling a portion of the contents of one package component is mixed with a portion of the content of the other package component. For color blending one of the package components may be prepared in different tints.
Inventors
- 👤 Ii Henry Lawrence Lee
- 👤 Francis Fabian Smith
- 👤 Michael Lawrence Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:41
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; C08J3/241; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
273 words
A METHOD OF FILLING A TOOTH COMPRISING THE STEPS OF: A. PROVIDING A FIRST QUANTITY OF PASTE-LIKE MATERIAL CONSISTING ESENTIALLY OF A PREMIXED UNPOLYMERIZED ESIN BINDER SYSTEM CONTAINING ACTIVE POLYFUNCTIONAL MONOMER HAVING A CENTRAL PORTION WHICH CONTAINS AT LEAST ONE AROMAATIC RING AND AT LEAST TWO ACRYLIC END GROUPS, A FINELY-DIVIDED ORGANOSILANE KEYING AGENT-TREATED INORGANIC FILLER CONSTITUTING AT LEAST 65 PERCENT BY WEIGHT OF SAID PASTE-LIKE MATERIAL; AND A FREE RADICAL GENERATING CATAALYST FOR SAID BINDER SYSTEM IN WHICH THE FREE RADICALS WHEN GENERATED IN SUFFICIENT QUANTITIES WILL PRODUCE RELATIVELY RAPID POLYMERIZATION OF SAID SYSTEM; B. PROVIDING A SECOND QUANTITY OF PASTE-LIKE MATERIAL CONSISTING ESSENTIALLY OF: SUBSTANTIALLY THE SAME PREMIXED UNPOLYMERIZED RESIN BINDER SYSTEM WHICH IS IN SAID FIRST QUANTITY OF MATERIAL, A FINELY-DIVIDED ORGANOSILANE KEYING AGENT-TREATED, INORGANIC FILLER CONSITUTING AT LEAST 65 PERCENT BY WEIGHT OF SAID SECOND QUANTITY OF PASTE-LIKE MATERIAL; AND AN ACTAIVATOR FOR SAID CATALYST TO CAUSE THE AFORESAID GENERATION OF FREE RADICALS IS SUFFICIENT QUANTITIES TO PRODUCE RELATIVELY RAPID POLYMERIZATION OF SAID BINDER SYSTEM; C. EXTRACTING FROM EACH OF SAID QUANTITIES OF MATERIAL APPROXIMATELY EQUAL AMOUNTS OF THE SAME SUFFICIENT TO EFFECT THE DESIRED TOOTH RESTORATION; D. MIXING SAID EXTRACTED QUANTITIES SO THAT SAID ACTIVATOR OF SAID SECOND QUANTITY OF MATERIAL REACTS WITH SAID CATALYST OF SAID FIRST QUANTITY OF MATERIAL CAUSING THE GENERATION OF SUFFICIENT FREE RADICALS TO INITIATE RELATIVELY RAPIDF POLYMERIZATION OF SAID RESIN BINDER SYSTEM; AND E. PROMPTLY FILLING A TOOTH WITH SAID MIXTURE BEFORE IT HARDENS DUE TO POLYMERIZATION SO THAT AFTER SAID MIXTURE IS IN A TOOTH IT WILL HARDEN IN A KNOWN AND SUBSTANTIALLY UNIFORM TIME TO FORM A HARD DENTAL FILLING.
Claim 2
Independent Claim
273 words
A METHOD OF FILLING A TOOTH COMPRISING THE STEPS OF: A. PROVIDING A FIRST QUANTITY OF PASTE-LIKE MATERIAL CONSISTING ESENTIALLY OF A PREMIXED UNPOLYMERIZED ESIN BINDER SYSTEM CONTAINING ACTIVE POLYFUNCTIONAL MONOMER HAVING A CENTRAL PORTION WHICH CONTAINS AT LEAST ONE AROMAATIC RING AND AT LEAST TWO ACRYLIC END GROUPS, A FINELY-DIVIDED ORGANOSILANE KEYING AGENT-TREATED INORGANIC FILLER CONSTITUTING AT LEAST 65 PERCENT BY WEIGHT OF SAID PASTE-LIKE MATERIAL; AND A FREE RADICAL GENERATING CATAALYST FOR SAID BINDER SYSTEM IN WHICH THE FREE RADICALS WHEN GENERATED IN SUFFICIENT QUANTITIES WILL PRODUCE RELATIVELY RAPID POLYMERIZATION OF SAID SYSTEM; B. PROVIDING A SECOND QUANTITY OF PASTE-LIKE MATERIAL CONSISTING ESSENTIALLY OF: SUBSTANTIALLY THE SAME PREMIXED UNPOLYMERIZED RESIN BINDER SYSTEM WHICH IS IN SAID FIRST QUANTITY OF MATERIAL, A FINELY-DIVIDED ORGANOSILANE KEYING AGENT-TREATED, INORGANIC FILLER CONSITUTING AT LEAST 65 PERCENT BY WEIGHT OF SAID SECOND QUANTITY OF PASTE-LIKE MATERIAL; AND AN ACTAIVATOR FOR SAID CATALYST TO CAUSE THE AFORESAID GENERATION OF FREE RADICALS IS SUFFICIENT QUANTITIES TO PRODUCE RELATIVELY RAPID POLYMERIZATION OF SAID BINDER SYSTEM; C. EXTRACTING FROM EACH OF SAID QUANTITIES OF MATERIAL APPROXIMATELY EQUAL AMOUNTS OF THE SAME SUFFICIENT TO EFFECT THE DESIRED TOOTH RESTORATION; D. MIXING SAID EXTRACTED QUANTITIES SO THAT SAID ACTIVATOR OF SAID SECOND QUANTITY OF MATERIAL REACTS WITH SAID CATALYST OF SAID FIRST QUANTITY OF MATERIAL CAUSING THE GENERATION OF SUFFICIENT FREE RADICALS TO INITIATE RELATIVELY RAPIDF POLYMERIZATION OF SAID RESIN BINDER SYSTEM; AND E. PROMPTLY FILLING A TOOTH WITH SAID MIXTURE BEFORE IT HARDENS DUE TO POLYMERIZATION SO THAT AFTER SAID MIXTURE IS IN A TOOTH IT WILL HARDEN IN A KNOWN AND SUBSTANTIALLY UNIFORM TIME TO FORM A HARD DENTAL FILLING.
Claim 3
Independent Claim
203 words
A method of producing a hard dental filling comprising the steps of: a. taking a quantity of paste-like material consisting essentially of: pre-mixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said materal; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; b. mixing an activator which is reactive with said catalyst to cause generation of free radIcals in sufficient quantities to cause relatively rapid polymerization of said system into said quantity of paste-like material so as to initiate relatively rapid polymerization of said system, said activator being added in the form of a paste-like composition in which the activator is substantially uniformly dispersed throughout a mixture of unpolymerized resin binder system and finely divided filler, said activator when mixed in such form resulting in a more uniform initiation of polymerization throughout the binder system and a dental filling of greater initial hardness when said mixture is placed in a tooth immediately after preparation.
Claim 4
Independent Claim
203 words
A method of producing a hard dental filling comprising the steps of: a. taking a quantity of paste-like material consisting essentially of: pre-mixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said materal; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; b. mixing an activator which is reactive with said catalyst to cause generation of free radIcals in sufficient quantities to cause relatively rapid polymerization of said system into said quantity of paste-like material so as to initiate relatively rapid polymerization of said system, said activator being added in the form of a paste-like composition in which the activator is substantially uniformly dispersed throughout a mixture of unpolymerized resin binder system and finely divided filler, said activator when mixed in such form resulting in a more uniform initiation of polymerization throughout the binder system and a dental filling of greater initial hardness when said mixture is placed in a tooth immediately after preparation.
Claim 5
Dependent Claim
104 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 6
Dependent Claim
104 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 7
Dependent Claim
121 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 8
Dependent Claim
121 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 9
Dependent Claim
132 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material, in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and filler; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 10
Dependent Claim
132 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material, in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and filler; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 11
Dependent Claim
122 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups and which resin binder system includes at least 85 percent by weight of bis phenol A backbone monomer; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 12
Dependent Claim
122 words
A storable and activatable paste-like material for use in producing a hard dental filling material consisting essentially of: an intimate mix of resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups and which resin binder system includes at least 85 percent by weight of bis phenol A backbone monomer; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said material; and a free radical generating catalyst which when activated will generate free radicals in sufficient quantity to produce relatively rapid polymerization of said system and which material will remain substantially unpolymerized and ready to be activated for a period of months.
Claim 13
Dependent Claim
251 words
A manufacture specifically for a dentist to use in produciNg hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of materials to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
Claim 14
Dependent Claim
251 words
A manufacture specifically for a dentist to use in produciNg hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of materials to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
Claim 15
Dependent Claim
280 words
A manufacture specifically for a dentist to use in producinng hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth; and the quantity of material containing the activator being colored so that said mixture will substantially match the color of the tooth in which it is to be placed.
Claim 16
Dependent Claim
280 words
A manufacture specifically for a dentist to use in producinng hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth; and the quantity of material containing the activator being colored so that said mixture will substantially match the color of the tooth in which it is to be placed.
Claim 17
Dependent Claim
314 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the mateial in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portioN which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system a. in said first container; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of material extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth; and the quantity of material containing the activator being colored so that said mixture will substantially match the color of the tooth in which it is to be placed.
Claim 18
Dependent Claim
314 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the mateial in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portioN which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system a. in said first container; finely-divided, organosilane keying agent-treated, inorganic filler selected from the group consisting of fused silica, aluminum oxide, crystalline quartz and glass beads, said filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system; the mixture of material extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth; and the quantity of material containing the activator being colored so that said mixture will substantially match the color of the tooth in which it is to be placed.
Claim 19
Dependent Claim
309 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of materials to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material, in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and said filler; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first containers; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and said filler; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity of produce relatively rapid polymerization of said system, the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
Claim 20
Dependent Claim
309 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of materials to produce a dental filling to be made, the material in one of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material, in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and said filler; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first containers; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container in which a small portion of said filler is replaced by an amount of hydrophobic submicron silica sufficient to substantially eliminate separation between said binder system and said filler; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity of produce relatively rapid polymerization of said system, the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
Claim 21
Dependent Claim
271 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the material in One of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups and in which said resin binder system includes at least 85 percent by weight of bis phenol A backbone monomer; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system, the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
Claim 22
Dependent Claim
271 words
A manufacture specifically for a dentist to use in producing hard dental fillings in a substantially uniform manner, said manufacture being composed of two paste-like materials disposed in separate containers and from each of which containers a dentist may extract necessary amounts of material to produce a dental filling to be made, the material in One of said containers consisting essentially of: premixed unpolymerized resin binder system containing active polyfunctional monomer having a central portion which contains at least one aromatic ring and at least two acrylic end groups and in which said resin binder system includes at least 85 percent by weight of bis phenol A backbone monomer; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of said paste-like material; and free radical generating catalyst for said system in which the free radicals when generated in sufficient quantities will produce relatively rapid polymerization of said system; the material in the other of said containers consisting essentially of: substantially the same premixed unpolymerized resin binder system as in said first container; finely-divided, organosilane keying agent-treated, inorganic filler constituting at least 65 percent by weight of the material in said other container; and activator reactive with the catalyst in the material of said one container to cause generation of free radicals in sufficient quantity to produce relatively rapid polymerization of said system, the mixture of materials extracted from each of said containers causing polymerization of said binder system to be initiated and hardening of the mixture to occur in a known and substantially uniform time to produce a hard dental filling after being placed in a tooth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |