US2907277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning auger pump
Assignee: Individual
•
Filing: 1957-06-21
•
Granted: 1959-10-06
•
Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Oswald E Lessly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:01
CPC Classifications
F; F04; F04D; F04D3/00; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1114092A
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US1200863A
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US1444944A
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GB211848A
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US1756276A
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GB386626A
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US1889603A
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FR899123A
Cited
GB567472A
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US2744465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |