US2990848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure differential control
Assignee: Norgren LLC
•
Filing: 1955-07-19
•
Granted: 1961-07-04
•
Expires: 1975-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Jesse A Wilson
- 👤 Morley V Friedell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/14; G05D16/18; G05D16/028; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3112; Y10T137/7722; Y10T137/7748; Y10T137/7753; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7791
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |