US2693148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impulse feed pump for aircraft
Assignee: Individual
•
Filing: 1949-05-13
•
Granted: 1954-11-02
•
Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 Gandolph C Doelter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/04; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/46; F02K9/48; F04D13/043; F04D9/00; F04D9/001; F04D9/002; F04D9/003; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86035
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1345895A
Cited
US1472560A
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US2369440A
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US2382412A
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US2393691A
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US2392128A
Cited
US2418221A
Cited
US2422956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |