US2973779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor by-pass valve
Assignee: Corken Inc
•
Filing: 1956-12-14
•
Granted: 1961-03-07
•
Expires: 1976-12-14
Abstract
No abstract record available.
Inventors
- 👤 Garth P Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:45
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/168; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7777; Y10T137/7837; Y10T137/7838; Y10T137/7839; Y10T137/7841
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2442361A
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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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |