US2704649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valve for reversible refrigerating system
Assignee: General Electric Co
•
Filing: 1951-08-16
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Granted: 1955-03-22
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Expires: 1971-08-16
Abstract
No abstract record available.
Inventors
- 👤 Francis R Ellenberger
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; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86968; Y10T137/877; Y10T137/87708; Y10T137/87772
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189313881A
Cited
US829120A
Cited
US1223584A
Cited
US2496553A
Cited
US2441201A
Cited
US2392741A
Cited
US2553940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |