Patent US4242598A successfully refreshed from Google Patents.
US2176325A
Expired / Lapsed
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Fluid impelling means
Assignee: Individual
•
Filing: 1937-08-04
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Granted: 1939-10-17
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Expires: 1957-08-04
Abstract
No abstract record available.
Inventors
- 👤 Walter H Bretzlaff
- 👤 Charles P Grimes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:11
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/325; F04D17/00; F04D17/08; F04D17/16; F04D25/00; F04D25/16; F04D25/166; Y; Y10; Y10S; Y10S416/00; Y10S416/03
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) | 1942-10-16 | 1943-04-17 | 1943-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-16 | 1947-04-17 | 1947-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-16 | 1951-04-17 | 1951-10-17 | $7700.00 | Window Closed / Lapsed |