US2953148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic system with feedback arrangement
Assignee: Daystrom Inc
•
Filing: 1955-03-08
•
Granted: 1960-09-20
•
Expires: 1975-03-08
Abstract
No abstract record available.
Inventors
- 👤 Robert C Langford
- 👤 Stanley M Van Pelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:04
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/10; F15C3/14; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/2365; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23723E
Cited
GB458823A
Cited
US2102007A
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US2254098A
Cited
US2332627A
Cited
US2380858A
Cited
US2441044A
Cited
US2518224A
Cited
US2675819A
Cited
US2638874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |