Patent US2587933A successfully refreshed from Google Patents.
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 09:57
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US568680A
Cited
GB189915885A
Cited
US1676650A
Cited
US1959822A
Cited
FR748580A
Cited
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 |