US2665072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for controlling the admission of refrigerant to evaporators
Assignee: General Controls Co
•
Filing: 1949-02-28
•
Granted: 1954-01-05
•
Expires: 1969-02-28
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:00
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/325; F25B41/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2490420A
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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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |