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Patent US2812684A successfully refreshed from Google Patents.
US2812684A
Expired / Lapsed
US
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Arbor nut with fluid pressure actuated spacer engaging pins
Assignee: Individual
•
Filing: 1954-07-27
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Granted: 1957-11-12
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Expires: 1974-07-27
Abstract
No abstract record available.
Inventors
- 👤 Schrem Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:50
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; B25B27/026; B25B27/023; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53678
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |