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US2709339A
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Two-stage pumping system with automatic demand responsive control
Assignee: PACIFIC AIRMOTIVE Corp
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Filing: 1953-07-06
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Granted: 1955-05-31
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Expires: 1973-07-06
Abstract
No abstract record available.
Inventors
- 👤 Edelman Philip
- 👤 Rudy Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:25
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/22; F04B49/24; F04B1/00; F04B1/12; F04B1/122; F04B1/124; F04B1/126; F04B1/14; F04B1/141; F04B1/146; F04B1/16; F04B49/007; F04B53/00; F04B53/10; F04B53/1002; Y; Y10; Y10S; Y10S74/00; Y10S74/10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18128; Y10T74/18136; Y10T74/18296; Y10T74/18336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1818307A
Cited
GB424609A
Cited
US2280875A
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US2340349A
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US2295833A
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US2431686A
Cited
US2428809A
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US2608159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |