Patent US2923930A successfully refreshed from Google Patents.
US2923930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certificate of correction
Assignee: —
•
Filing: —
•
Granted: 1960-02-02
•
Expires: 1977-02-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:56
CPC Classifications
F; F41; F41H; F41H9/00; F41H9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US922709A
Cited
US1207393A
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US1823304A
Cited
US2148438A
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US2399265A
Cited
US2282268A
Cited
US2177032A
Cited
US2334552A
Cited
US2426065A
Cited
US2476171A
Cited
US2557162A
Cited
US2663319A
Cited
US2666451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |