Patent US1660939A successfully refreshed from Google Patents.
US1660939A
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US
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Conveying mechanism
Assignee: C O Bartlett & Snow Co
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Filing: 1922-12-04
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Granted: 1928-02-28
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Expires: 1942-12-04
Abstract
No abstract record available.
Inventors
- 👤 Karl F Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-02-27 | 1931-08-29 | 1932-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-27 | 1935-08-29 | 1936-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-27 | 1939-08-29 | 1940-02-28 | $7700.00 | Window Closed / Lapsed |