US2769717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression material
Assignee: L D CAULK Co
•
Filing: 1953-11-25
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Granted: 1956-11-06
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Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Cresson James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:16
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITION FOR TAKING DENTAL IMPRESSIONS CONSISTING ESSENTIALLY OF AN ALKALI METAL ALGINATE, CALCIUM SULPHATE AND AN ALKALI METAL ZINC FLUORIDE, SAID FLUORIDE BEING ADAPTED TO ELIMINATE FIXING OF SAID COMPOSITION WHILE MAINTAINING THE SHELF LIFE AND PROPER SETTING TIME THEREOF.
Claim 2
Dependent Claim
41 words
A COMPOSITION FOR TAKING DENTAL IMPRESSIONS CONSISTING ESSENTIALLY OF AN ALKALI METAL ALGINATE, CALCIUM SULPHATE AND AN ALKALI METAL ZINC FLUORIDE, SAID FLUORIDE BEING ADAPTED TO ELIMINATE FIXING OF SAID COMPOSITION WHILE MAINTAINING THE SHELF LIFE AND PROPER SETTING TIME THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |