Patent US2991531A successfully refreshed from Google Patents.
US2991531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitoring system for presses and the like
Assignee: Individual
•
Filing: 1957-01-18
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Granted: 1961-07-11
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Expires: 1977-01-18
Abstract
No abstract record available.
Inventors
- 👤 Gates Major Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/14; B30B15/148; F; F16; F16H; F16H53/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2357860A
Cited
US1640944A
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US1619729A
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US2334082A
Cited
US2455823A
Cited
US2663421A
Cited
US2664557A
Cited
US2712168A
Cited
US2716900A
Cited
US2790204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |