US2986159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant pressure valve
Assignee: Individual
•
Filing: 1958-04-01
•
Granted: 1961-05-30
•
Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Mahlon C Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:19
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; G05D16/0658; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7781; Y10T137/7782; Y10T137/7834
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB518482A
Cited
FR908989A
Cited
US2674268A
Cited
GB671186A
Cited
US2681074A
Cited
US2693821A
Cited
US2827076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |