US3785832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental primer varnish
Assignee: United States Department of Health and Human Services
•
Filing: 1971-10-13
•
Granted: 1974-01-15
•
Expires: 1991-10-13
Abstract
Abstract A dental adhesive primer and varnish composition free of polymerizable monomers during storage and suitable specially for adhering dental direct filling resins and composite materials to human dentin and enamel consisting of the reaction product of Nphenyl glycine (NPG) type moiety and a glycidyl ether moiety containing at least one epoxy group such as p-chlorophenyl-2,3epoxypropylether (CGE) or the reaction product of bisphenol A with epichlorohydrin (DGEBA) dissolved in the weight amount of about 5-15 percent in a suitable solvent, such as acetone, chloroform, and ether.
Inventors
- 👤 R Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:19
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A varnish preparation according to claim 1 wherein the NPG moiety is N-phenyl glycine and the aromatic glycidyl ether moiety is p-chlorophenyl glycidyl ether in about 5-15 percent weight in acetone.
Claim 2
Dependent Claim
39 words
A varnish preparation according to claim 1 wherein the NPG reactant is N-phenyl glycine and the aromatic glycidyl ether moiety is the diglycidyl ether of bisphenol A dissolved in the amount of about 5-15 percent by weight in acetone.
Claim 3
Independent Claim
34 words
The method of improving the adhesion of a resin filling material to human dentin and enamel which consists of interposing an adhesive primer varnish consisting of the reaction product of NPG moiety selected from
Claim 4
Dependent Claim
29 words
The method according to claim 4 wherein the NPG moiety is N-phenyl glycine and the aromatic glycidyl ether moiety is p-chlorophenyl glycidyl ether in about 5-15 percent by weight.
Claim 5
Dependent Claim
38 words
The method according to claim 4 wherein the NPG reactant is N-phenyl glycine and the aromatic glycidyl ether moiety is the diglycidyl ether of bisphenol A dissolved in the amount of about 5-15 percent by weight in acetone.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |