Patent US2874550A successfully refreshed from Google Patents.
US2874550A
Expired / Lapsed
US
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Winter control valve arrangement in refrigerating system
Assignee: Keeprite Products Ltd
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Filing: 1955-05-19
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Granted: 1959-02-24
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 Musson Harry Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:35
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B2500/00; F25B2500/31; Y; Y10; Y10S; Y10S62/00; Y10S62/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2434593A
Cited
US2621051A
Cited
US2564310A
Cited
US2621487A
Cited
US2710507A
Cited
US2706386A
Cited
US2761287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |