US2871879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas pressure control means
Assignee: CA Olsen Manufacturing Co
•
Filing: 1955-07-07
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Granted: 1959-02-03
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Expires: 1975-07-07
Abstract
No abstract record available.
Inventors
- 👤 Edward R Downe
- 👤 Ward B Travers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:45
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/7823; Y10T137/7825; Y10T137/7837; Y10T137/7847; Y10T137/7849
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138446A
Cited
US1844842A
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US2302284A
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US2359111A
Cited
US2634088A
Cited
US2509839A
Cited
FR1053484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |