US3878138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anhydrous products having improved wettability characteristics
Assignee: Warner Lambert Co LLC
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Filing: 1972-10-30
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Granted: 1975-04-15
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Expires: 1992-10-30
Abstract
Abstract Water-wettable anhydrous products, such as the powders and creams used in cosmetic and drug products, are admixed with 20 percent to 60 percent by weight, based on the weight of the total formulation, of a powdered polyethylene or powdered polypropylene polymer, to improve wettability characteristics. Denture adhesive powders prepared from an anionic/cationic adhesive combination, together with the powdered polyethylene or polypropylene polymer display particularly improved properties. The polyethylene or polypropylene polymer may also be admixed with other anhydrous products including dentifrices, vaginal powder sprays, and the like. Low molecular weight polyethylene powder, with an average molecular weight of from 1,000 to 3,500, is suitable for use in products of the invention. For the polypropylene, a molecular weight of from 120,000 to 350,000 is specified. The powdered polymers have a particle size of less than 422 microns.
Inventors
- 👤 James J Keegan
- 👤 Girish Patel
- 👤 Howard Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:31
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K47/00; A61K47/30; A61K47/32; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8105; A61K8/8111; A61K8/8141; A61K8/8158; A61K9/00; A61K9/0012; A61K9/0034; C; C09; C09J; C09J133/00; C09J133/24; A61K2800/00; A61K2800/20; A61K2800/30; A61K2800/31; C08; C08L; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
137 words
A DENTURE ADHESIVE POWDER HAVING SUPERIOR WETTABILITY CHARACTERISTICS CONSISTING ESSENTIALLY OF A SUBSTANTIALLY ANHYDROUS MIXTURE OF NONTOXIC, ADHESIVE INGREDIENTS AND FROM ABOUT 40 PERCENT TO ABOUT 60 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESICE INGREDIENTS OF A POWDERED POLYMERIC MATERIAL HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT 422 MICRONS, SAID POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POWDERED POLYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT RANGING FROM ABOUT 1000 TO 3500 AND POWDERED POLYPROPYLENE HAVING AN AVERAGE MOLECULAR WEIGHT RANGING FROM ABOUT 120,000 TO 350,000; SAID DENTURE ADHESIVE INGREDIENTS COMPRISING A SUBSTANTIALLY ANHYDROUS MIXTURE OF: A. FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESIVE INGREDIENTS OF AT LEAST ONE CATIONIC POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
137 words
A DENTURE ADHESIVE POWDER HAVING SUPERIOR WETTABILITY CHARACTERISTICS CONSISTING ESSENTIALLY OF A SUBSTANTIALLY ANHYDROUS MIXTURE OF NONTOXIC, ADHESIVE INGREDIENTS AND FROM ABOUT 40 PERCENT TO ABOUT 60 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESICE INGREDIENTS OF A POWDERED POLYMERIC MATERIAL HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN ABOUT 422 MICRONS, SAID POLYMERIC MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF POWDERED POLYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT RANGING FROM ABOUT 1000 TO 3500 AND POWDERED POLYPROPYLENE HAVING AN AVERAGE MOLECULAR WEIGHT RANGING FROM ABOUT 120,000 TO 350,000; SAID DENTURE ADHESIVE INGREDIENTS COMPRISING A SUBSTANTIALLY ANHYDROUS MIXTURE OF: A. FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESIVE INGREDIENTS OF AT LEAST ONE CATIONIC POLYMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF
Claim 3
Dependent Claim
8 words
A COPOLYMER OF AN ACRYLAMIDE HAVING THE FORMULA:
Claim 4
Dependent Claim
8 words
A COPOLYMER OF AN ACRYLAMIDE HAVING THE FORMULA:
Claim 5
Dependent Claim
59 words
ABOVE WITH A VINYL OF ALKYL-SUBSTITUTED VINYL PYRIDINIUM SALT, WHEREIN THE ALKYL GROUP IS 1 TO 7 CARBON LOWER ALKYL; AND B. FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESIVE, OF A LEAST ONE ANIONIC GUM SELECTED FROM THE GROUP CONSISTING OF CARBOXYMETHYLCELLULOSE GUM AND CELLULOSE SULFATE GUM.
Claim 6
Dependent Claim
59 words
ABOVE WITH A VINYL OF ALKYL-SUBSTITUTED VINYL PYRIDINIUM SALT, WHEREIN THE ALKYL GROUP IS 1 TO 7 CARBON LOWER ALKYL; AND B. FROM ABOUT 5 PERCENT TO ABOUT 55 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DENTURE ADHESIVE, OF A LEAST ONE ANIONIC GUM SELECTED FROM THE GROUP CONSISTING OF CARBOXYMETHYLCELLULOSE GUM AND CELLULOSE SULFATE GUM.
Claim 7
Dependent Claim
8 words
A COPOLYMER OF AN ACRYLAMIDE HAVING THE FORMULA
Claim 8
Dependent Claim
8 words
A COPOLYMER OF AN ACRYLAMIDE HAVING THE FORMULA
Claim 9
Dependent Claim
96 words
A denture adhesive according to claim 1 wherein the powdered polymeric material which provides the superior wettability characteristics is present in an amount of from about 45 to about 55 percent by weight, based on the total weight of the denture adhesive ingredients; said powdered polymeric material having an average particle size of between about 74 to 149 microns and being selected from the group consisting of a powdered polyethylene having a molecular weight of from about 2,000 to about 2500, and powdered polypropylene having an average molecular weight of from about 120,000 to about 160,000.
Claim 10
Dependent Claim
68 words
a copolymer of an acrylamide having the formula I. above with a vinyl or alkyl-substituted vinyl pyridinium salt, wherein the alkyl group is 1 to 7 carbon lower alkyl; and B. from about 5 percent to about 55 percent by weight, based on the total weight of the denture adhesive, of at least one anionic gum selected from the group consisting of carboxymethylcellulose gum and cellulose sulfate gum.
Claim 11
Dependent Claim
68 words
a copolymer of an acrylamide having the formula I. above with a vinyl or alkyl-substituted vinyl pyridinium salt, wherein the alkyl group is 1 to 7 carbon lower alkyl; and B. from about 5 percent to about 55 percent by weight, based on the total weight of the denture adhesive, of at least one anionic gum selected from the group consisting of carboxymethylcellulose gum and cellulose sulfate gum.
Claim 12
Dependent Claim
115 words
A denture adhesive powder according to claim 2 wherein the adhesive ingredients comprise: A. from about 5 percent to about 20 percent by weight, based on the total weight of the denture adhesive ingredients, of at least one cationic copolymer of acrylamide with a vinyl quaternary ammonium salt selected from the group consisting of trialkylaminoalkyl acrylate salts, trialkylaminoalky methacrylate salts, and vinyloxyalkyltrialkylammonium salts, wherein the alkyl group contains from 1 to 3 carbon atoms; and trialkylaminoalkyl B. from about 20 percent to about 50 percent by weight, based on the total weight of the denture adhesive ingredients, of at least one anionic gum selected from the group consisting of cellulose sulfate gum and carboxymethylcellulose gum.
Claim 13
Dependent Claim
76 words
A denture adhesive powder according to claim 3 consisting essentially of: A. about 10 percent by weight, based on the total weight of the denture adhesive ingredients, of a cationic copolymer of acrylamide with Beta -methacryloyloxyethyltrimethyl ammonium methyl sulfate; B. about 40 percent by weight of sodium carboxymethylcellulose; and C. about 50 percent by weight of a powdered polyethylene having an average molecular weight of about 2,000, and an average particle size of about 74 microns.
Claim 14
Dependent Claim
71 words
A process for improving the wettability characteristics of an anhydrous denture adhesive powder as claimed in claim 1 which comprises admixing therewith from about 20 percent to about 60 percent by weight, based on the total weight of the preparation of a powdered polymeric material having an average particle size of less than about 422 microns; said polymeric material being selected from the group consisting of powdered polyethylene and powdered polypropylene.
Claim 15
Dependent Claim
39 words
A process according to claim 5 wherein said powdered polyethylene has an average molecular weight ranging from about 1,000 to about 3,500, and wherein said powdered polypropylene has an average molecular weight ranging from about 120,000 to about 350,000.
Claim 16
Dependent Claim
61 words
A process according to claim 6 wherein the powdered polymeric material has an average particle size of from between about 74 to 149 microns, and is selected from the group consisting of powdered polyethylene having an average molecular weight ranging from about 2,000 to about 2,500, and powdered polypropylene having an average molecular weight ranging from about 120,000 to about 160,000.
Claim 17
Dependent Claim
35 words
A process according to claim 7 wherein the powdered polymeric material is present in an amount of from about 20 percent to about 55 percent by weight, based on the total weight of the preparation.
Claim 18
Dependent Claim
30 words
A process according to claim 8 wherein said powdered polymeric material is polyethylene having an average molecular weight of about 2,000 and an average particle size of about 74 microns.
Claim 19
Dependent Claim
30 words
A process according to claim 8 wherein said powdered polymeric material is polypropylene having an average molecular weight of about 140,000 and an average particle size of about 74 microns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |