US2782610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction for reverse cycle system
Assignee: SEAL O MATIC Inc
•
Filing: 1955-01-24
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Granted: 1957-02-26
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Expires: 1975-01-24
Abstract
No abstract record available.
Inventors
- 👤 Frank J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:30
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/20; F25B41/26; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87507; Y10T137/87555; Y10T137/87563; Y10T137/877; Y10T137/87708; Y10T137/87716; Y10T137/87772
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR441025A
Cited
US1397080A
Cited
US1911775A
Cited
US1805868A
Cited
US2175412A
Cited
CH216218A
Cited
US2351140A
Cited
US2654227A
Cited
US2704649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |