US3928280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dental restorative filling materials
Assignee: Wallace A Erickson and Co
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Filing: 1974-07-05
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Granted: 1975-12-23
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Expires: 1994-07-05
Abstract
Abstract Means and method for preparing a polymerized resin dental restorative material. The polymerizable mixture is mixed on the surface of a substrate having a controlled removable layer of a suitable catalyst, incorporating into the mixture an amount of catalyst controlled by the area of the substrate over which the mixing is effected.
Inventors
- 👤 Wallace A Erickson
- 👤 Byoung Suh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:12
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
99 words
A UNITARY DENTAL RESTORATIVE MATERIAL PACK COMPRISING: A PASTE-LIKE PHASE CONTAINING A POLYMERIZABLE COMPONENT COMPRISING THE REACTION PRODUCT OF A BISPHENOL AND A GLYCIDYL ACRYLATE OR METHACRYLATE; A SHEET-LIKE SUBSTRATE CARRYING ON ITS SURFACE A CONTROLLED REMOVABLE LAYER OF SAID SOLID ORGANIC PEROXIDE CATALYST FOR THE POLYMERIZATION OF SAID POLYMERIZABLE COMPONENT; THE PACK HAVING MEANS TO PREVENT PREMATURE CONTACT BETWEEN SAID CATALYST AND SAID POLYMERIZABLE COMPONENTS; SAID CATALYST BEING AVAILABLE FOR INCORPORATION INTO SAID PASTE-LIKE PHASE, IN SUFFICIENT QUANTITY TO CATALYZE THE POLYMERIZATION OF SAID POLYMERIZABLE COMPONENT, ON SPATULATION OF SAID PASTE-LIKE PHASE ON THE SURFACE OF SAID SUBSTRATE.
Claim 2
Dependent Claim
99 words
A UNITARY DENTAL RESTORATIVE MATERIAL PACK COMPRISING: A PASTE-LIKE PHASE CONTAINING A POLYMERIZABLE COMPONENT COMPRISING THE REACTION PRODUCT OF A BISPHENOL AND A GLYCIDYL ACRYLATE OR METHACRYLATE; A SHEET-LIKE SUBSTRATE CARRYING ON ITS SURFACE A CONTROLLED REMOVABLE LAYER OF SAID SOLID ORGANIC PEROXIDE CATALYST FOR THE POLYMERIZATION OF SAID POLYMERIZABLE COMPONENT; THE PACK HAVING MEANS TO PREVENT PREMATURE CONTACT BETWEEN SAID CATALYST AND SAID POLYMERIZABLE COMPONENTS; SAID CATALYST BEING AVAILABLE FOR INCORPORATION INTO SAID PASTE-LIKE PHASE, IN SUFFICIENT QUANTITY TO CATALYZE THE POLYMERIZATION OF SAID POLYMERIZABLE COMPONENT, ON SPATULATION OF SAID PASTE-LIKE PHASE ON THE SURFACE OF SAID SUBSTRATE.
Claim 3
Dependent Claim
51 words
The pack of claim 1, wherein said paste-like phase includes a finely divided inorganic filler and an aromatic tertiary amine accelerator for said catalyst, the reaction between said accelerator and said catalyst on spatulation of said paste-like phase on said substrate generating free radicals for the polymerization of said polymerizable component.
Claim 4
Dependent Claim
36 words
The pack of claim 2, in which said polymerizable component comprises the reaction product of bisphenol A and glycidyl methacrylate, said accelerator is dimethyl paratoluidine, said catalyst is benzoyl peroxide, and said filler is crystalline quartz.
Claim 5
Dependent Claim
18 words
The pack of claim 3 in which said polymerizable component contains ethylene glycol dimethacrylate as an additional monomer.
Claim 6
Independent Claim
146 words
The method of preparing a dental restorative filling material comprising the steps of: preparing a paste-like component containing a polymerizable material comprising the reaction product of a bisphenol and a glycidyl acrylate or methacrylate, a finely divided inorganic filler material, and an aromatic tertiary amine accelerator for the polymerization of said polymerizable material; providing on a sheet-like substrate a controlled removable surface layer of a solid organic peroxide catalyst for the polymerization of said polymerizable material, said catalyst layer being sufficiently adherent to said substrate to withstand normal handling, while still being available for incorporation into said paste-like component by spatulation thereof; depositing said paste-like component onto said substrate; and spatulating said paste-like component over a limited area of said substrate, whereby there is incorporated into said component a sufficient quantity of said catalyst to coact with said accelerator for the polymerization of said polymerizable material.
Claim 7
Independent Claim
146 words
The method of preparing a dental restorative filling material comprising the steps of: preparing a paste-like component containing a polymerizable material comprising the reaction product of a bisphenol and a glycidyl acrylate or methacrylate, a finely divided inorganic filler material, and an aromatic tertiary amine accelerator for the polymerization of said polymerizable material; providing on a sheet-like substrate a controlled removable surface layer of a solid organic peroxide catalyst for the polymerization of said polymerizable material, said catalyst layer being sufficiently adherent to said substrate to withstand normal handling, while still being available for incorporation into said paste-like component by spatulation thereof; depositing said paste-like component onto said substrate; and spatulating said paste-like component over a limited area of said substrate, whereby there is incorporated into said component a sufficient quantity of said catalyst to coact with said accelerator for the polymerization of said polymerizable material.
Claim 8
Dependent Claim
25 words
The method of claim 5, wherein said catalyst is deposited on said substrate by impregnating said substrate with a solution of said catalyst and drying.
Claim 9
Dependent Claim
13 words
The method of claim 6, wherein said solution also contains a film-forming resin.
Claim 10
Dependent Claim
33 words
The method of claim 5 in which the rate of polymerization of said polymerizable material is controlled by controlling the size of the area of said substrate over which the material is spatulated.
References Cited (Backward Citations)
US3083118A
Cited
US3066112A
Cited
US3505428A
Cited
US3589853A
Cited
US3560408A
Cited
US3652317A
Cited
US3746658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |