US4012840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive pit and fissure sealant
Assignee: Individual
•
Filing: 1976-02-12
•
Granted: 1977-03-22
•
Expires: 1996-02-12
Abstract
Abstract An adhesive pit and fissure sealant for tooth surfaces which consists of a first material of a lower alkyl α-cyanoacrylate and ultra-microfine particles of silicon dioxide, a second material of a di-lower-alkylformamide and a third material of a hardening promoter.
Inventors
- 👤 Mitsuharu Takeuchi
- 👤 Akira Otsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A method for preventing teeth from decaying by sealing pits and fissures of sound teeth, which comprises: coating the surface of teeth with a mixture of a first material comprising a lower alkyl α-cyanoacrylate and ultra-microfine particles of silicon dioxide and a second material comprising a di-loweralkylformamide and then applying a third material of N,N-dimethyl-p-toluidine, N,N-dimethylaniline or N,N-diethylaniline onto the coated surface.
Claim 2
Independent Claim
62 words
A method for preventing teeth from decaying by sealing pits and fissures of sound teeth, which comprises: coating the surface of teeth with a mixture of a first material comprising a lower alkyl α-cyanoacrylate and ultra-microfine particles of silicon dioxide and a second material comprising a di-loweralkylformamide and then applying a third material of N,N-dimethyl-p-toluidine, N,N-dimethylaniline or N,N-diethylaniline onto the coated surface.
References Cited (Backward Citations)
US3518762A
Cited
US3540126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |