Patent US2693891A successfully refreshed from Google Patents.
US2693891A
Expired / Lapsed
US
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Elevating and dumping equipment
Assignee: Individual
•
Filing: 1952-03-18
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Granted: 1954-11-09
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Expires: 1972-03-18
Abstract
No abstract record available.
Inventors
- 👤 English Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:27
CPC Classifications
B; B66; B66B; B66B9/00; B66B17/00; B66B17/14; B66B17/26; B65; B65G; B65G2812/00; B65G2812/06; B65G2812/0609; B65G2812/0654; B65G2812/0663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US545177A
Cited
US719258A
Cited
US1487196A
Cited
US1673911A
Cited
GB238692A
Cited
US1687278A
Cited
GB438198A
Cited
US2581067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |