US3740850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tertiary aromatic amine accelerators in dental compositions
Assignee: DEPARTMENT OF HEALTH EDUCATION
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Filing: 1971-02-02
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Granted: 1973-06-26
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Expires: 1991-02-02
Abstract
Abstract Direct dental filling materials and corresponding methods of treating human teeth utilizing known methacrylate dental polymer formers, peroxide catalysts, reinforcing fillers and unique tertiary aromatic amine accelerators with large substituents on the nitrogen atom and alkyl substituents on the aromatic ring at the 3 and 5 positions or the 4 position. Particularly preferred structures are N,N-disubstituted 3,5-xylidines, 4-methyl, and 4tertiary butyl varieties. When used in direct dental fillings, the compounds are uniformly non-volatile, at least three members of the group are crystallizable, and at least one member of the group serves dually as an accelerator and monomer.
Inventors
- 👤 R Bowen
- 👤 H Argentar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; C08F2/00; C08F2/44; C08F283/00; C08F283/01; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
23 words
A direct dental filling composition according to claim 1 wherein the aMine accelerator is such that R'' and R'''' are each restricted to:
Claim 2
Dependent Claim
23 words
A direct dental filling composition according to claim 1 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 3
Dependent Claim
23 words
A direct dental filling composition according to claim 1 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 4
Dependent Claim
23 words
A direct dental filling composition according to claim 1 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 5
Dependent Claim
28 words
A direct dental filling composition according to claim 1 wherein the amine accelerator is restricted to the reaction product of 3,5-xylidine and the diglycidyl ether of bisphenol A.
Claim 6
Independent Claim
42 words
A method of treating human teeth for filling and for restorative purposes which comprises contacting said teeth with a direct filling composition consisting essentially of methacrylate monomer, a peroxide catalyst, a filler and an amine accelerator selected from the group consisting of
Claim 7
Dependent Claim
24 words
A method of treating human teeth according to claim 7 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 8
Dependent Claim
24 words
A method of treating human teeth according to claim 7 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 9
Dependent Claim
24 words
A method of treating human teeth according to claim 7 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 10
Dependent Claim
24 words
A method of treating human teeth according to claim 7 wherein the amine accelerator is such that R'' and R'''' are each restricted to:
Claim 11
Dependent Claim
29 words
A method of treating human teeth according to claim 7 wherein the amine accelerator is restricted to the reaction product of 3,5-xylidine and the diglycidyl ether of bisphenol A.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |