US2489362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: TRI CLOVER MACHINE CO
•
Filing: 1946-09-11
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Granted: 1949-11-29
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Expires: 1966-09-11
Abstract
No abstract record available.
Inventors
- 👤 Kay L Bastrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:29
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D35/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US455574A
Cited
US1223299A
Cited
US1580065A
Cited
US1645364A
Cited
US1940923A
Cited
US2271814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |