US2590137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antisurge control and exhaust valve for hydraulic apparatus
Assignee: Individual
•
Filing: 1946-05-24
•
Granted: 1952-03-25
•
Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Towler John Maurice
- 👤 Towler Frank Hathorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; B; B30; B30B; B30B15/00; B30B15/16; B30B15/18; B30B15/186; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |