US2449733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve actuating mechanism
Assignee: United Aircraft Products Inc
•
Filing: 1944-04-22
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Granted: 1948-09-21
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Expires: 1964-04-22
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Wilkening
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/162; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86501
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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |