US1945833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well turbine pump head and lubricating system therefor
Assignee: A D COOK Inc
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Filing: 1929-11-26
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Granted: 1934-02-06
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Expires: 1949-11-26
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/06; F04D29/061
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) | 1937-02-05 | 1937-08-07 | 1938-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-02-05 | 1941-08-07 | 1942-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-02-05 | 1945-08-07 | 1946-02-06 | $7700.00 | Window Closed / Lapsed |