US2160401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve mechanism for compressors
Assignee: SR Dresser Manufacturing Co
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Filing: 1937-11-11
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Granted: 1939-05-30
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Expires: 1957-11-11
Abstract
No abstract record available.
Inventors
- 👤 Robert C Engelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:58
CPC Classifications
F; F04; F04B; F04B39/00; F04B39/10; F04B39/1073; F04B39/12; F16; F16K; F16K15/00; F16K15/14; F16K15/1402; F16K15/148; F16K15/16; F16K15/162; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7668; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/784; Y10T137/7879; Y10T137/7888; Y10T137/789; Y10T137/7891; Y10T137/7892
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) | 1942-05-29 | 1942-11-28 | 1943-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-05-29 | 1946-11-28 | 1947-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-05-29 | 1950-11-28 | 1951-05-30 | $7700.00 | Window Closed / Lapsed |