US2855945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-rate responsive switching-valve for hydraulic circuits
Assignee: Individual
•
Filing: 1954-02-03
•
Granted: 1958-10-14
•
Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Gratzmuller Jean Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
F; F15; F15B; F15B21/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1726102A
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US2248354A
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US2484049A
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US2553045A
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US2545712A
Cited
US2591806A
Cited
US2679854A
Cited
US2690190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |