US2605779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure and vacuum relief valve
Assignee: CHESTER HEATER MANUFACTURING Co
•
Filing: 1948-04-20
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Granted: 1952-08-05
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Expires: 1968-04-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Smithisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:21
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/18; F16K17/19; F16K17/196; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1797; Y10T137/1804; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/7722; Y10T137/7771; Y10T137/7772; Y10T137/7777
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1798536A
Cited
US633707A
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US911603A
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US1087890A
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US1401002A
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US1756133A
Cited
US1705941A
Cited
US2360733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |