US2721640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the rate of increase of a fluid pressure
Assignee: Curtiss Wright Corp
•
Filing: 1952-01-04
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Granted: 1955-10-25
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Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 Feo Angelo De
- 👤 Jr William Francisco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:26
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/02; F16D48/04; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; F16D25/00; F16D25/12; F16D25/14; F16H; F16H61/00; F16H61/04; F16H61/06; F16H61/065; F16D2048/0215; F16D2048/0221; F16D2300/00; F16D2300/22; Y; Y10; Y10S; Y10S74/00; Y10S74/01; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2329742A
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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) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |