Patent US2680931A successfully refreshed from Google Patents.
US2680931A
Expired / Lapsed
US
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Coaster
Assignee: Individual
•
Filing: 1951-02-02
•
Granted: 1954-06-15
•
Expires: 1971-02-02
Abstract
No abstract record available.
Inventors
- 👤 George D Champion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:09
CPC Classifications
A; A47; A47G; A47G23/00; A47G23/03; A47G23/032; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1041; Y10T156/1043; Y10T156/1044; Y10T156/1048; Y10T156/1052; Y10T156/1056; Y10T156/1057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1910139A
Cited
US1971337A
Cited
US2014268A
Cited
US2004166A
Cited
US2003494A
Cited
US2118326A
Cited
US2163309A
Cited
US2205687A
Cited
US2551796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |