US2509879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pressure mechanism
Assignee: Individual
•
Filing: 1945-11-28
•
Granted: 1950-05-30
•
Expires: 1965-11-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Pelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:24
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3102; Y10T137/3105; Y10T137/5762; Y10T137/7722; Y10T137/7781; Y10T137/7832
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US261605A
Cited
US410181A
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US443789A
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US1680288A
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US1278118A
Cited
US1581546A
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US2007358A
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US2128206A
Cited
US2256565A
Cited
US2345380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |