Patent US2873941A successfully refreshed from Google Patents.
US2873941A
Expired / Lapsed
US
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Pressure relief valve for fluid pressure systems
Assignee: Individual
•
Filing: 1957-03-21
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Granted: 1959-02-17
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Kortchmar Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:09
CPC Classifications
F; F16; F16K; F16K51/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |