US2693873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw conveyer
Assignee: Individual
•
Filing: 1951-04-26
•
Granted: 1954-11-09
•
Expires: 1971-04-26
Abstract
No abstract record available.
Inventors
- 👤 Warren S Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:37
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/08; B65G33/14; B65G33/18; B65G33/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US852833A
Cited
US1069404A
Cited
US1415061A
Cited
US1468379A
Cited
US2173414A
Cited
US2226242A
Cited
US2632203A
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 |