US2856957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure operated valve
Assignee: Motors Liquidation Co
•
Filing: 1956-01-18
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Granted: 1958-10-21
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Expires: 1976-01-18
Abstract
No abstract record available.
Inventors
- 👤 Charles J Mcdowall
- 👤 Robert J Wente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:59
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; F02; F02C; F02C9/00; F02C9/16; F02C9/18; F04; F04D; F04D27/00; F04D27/02; F04D27/0207; F04D27/0215; F04D27/023; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904
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) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |