Patent US2980223A successfully refreshed from Google Patents.
US2980223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Object depository monitor
Assignee: Individual
•
Filing: 1957-07-31
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Granted: 1961-04-18
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Expires: 1977-07-31
Abstract
No abstract record available.
Inventors
- 👤 Stidham James Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:14
CPC Classifications
G; G07; G07D; G07D11/00; G07D11/009; G07D11/0096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US735324A
Cited
US1722313A
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US1890941A
Cited
US1949283A
Cited
US2211847A
Cited
US2108287A
Cited
US2278357A
Cited
US2474843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |