Patent US1761808A successfully refreshed from Google Patents.
US1761808A
Expired / Lapsed
US
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Piston
Assignee: Individual
•
Filing: 1927-10-08
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Granted: 1930-06-03
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Expires: 1947-10-08
Abstract
No abstract record available.
Inventors
- 👤 Ira A Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:41
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/08; F16J9/06; F16J9/061; F16J9/063
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) | 1933-06-02 | 1933-12-02 | 1934-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-06-02 | 1937-12-02 | 1938-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-06-02 | 1941-12-02 | 1942-06-03 | $7700.00 | Window Closed / Lapsed |