US2587933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear relief valve
Assignee: Individual
•
Filing: 1946-07-01
•
Granted: 1952-03-04
•
Expires: 1966-07-01
Abstract
No abstract record available.
Inventors
- 👤 Alexander S Volpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:54
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US568680A
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GB189915885A
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US1676650A
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US1959822A
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FR748580A
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US2071375A
Cited
FR774538A
Cited
US2208929A
Cited
US2303392A
Cited
US2305519A
Cited
US2453891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |