Patent US2569767A successfully refreshed from Google Patents.
US2569767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental material and method
Assignee: L D CAULK Co
•
Filing: 1946-05-27
•
Granted: 1951-10-02
•
Expires: 1966-05-27
Abstract
No abstract record available.
Inventors
- 👤 Frances E Knock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/0001; A61K; A61K6/00; A61K6/30; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB498877A
Cited
US2318845A
Cited
GB564829A
Cited
GB569684A
Cited
US2335133A
Cited
US2453665A
Cited
US2398736A
Cited
US2390437A
Cited
US2377041A
Cited
US2482825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |