Patent US2589440A successfully refreshed from Google Patents.
US2589440A
Expired / Lapsed
US
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Thresher with suction and blast fans mounted in housing
Assignee: Individual
•
Filing: 1946-08-21
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Granted: 1952-03-18
•
Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:24
CPC Classifications
A; A01; A01D; A01D41/00; A01D41/12; A01D41/1208; A01D41/1217; A01D41/02; A01F; A01F12/00; A01F12/10; A01F12/18; A01F12/182; A01F12/30; A01F12/385; A01F12/44; A01F12/444; A01F7/00; A01F7/02; A01F7/04
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |