US3804794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous zinc oxide-dicarboxylic acid polymer dental cement
Assignee: SIH Stiftung and Co Industrie Holding KG
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Filing: 1972-01-03
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Granted: 1974-04-16
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Expires: 1992-01-03
Abstract
Abstract DENTAL CEMENTS CONTAIN ZINC OXIDE AND AN AQUEOUS SOLUTION OF A POLYMER OF AN UNSATURATED ALPHA, BETA-DICARBOXYLIC ACID.
Inventors
- 👤 W Schmitt
- 👤 R Purrmann
- 👤 P Jochum
- 👤 W Zahler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:36
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/50; A61K6/54; A61K6/30; A61K6/80; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 0
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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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |