US2491905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerating system
Assignee: General Controls Co
•
Filing: 1944-05-29
•
Granted: 1949-12-20
•
Expires: 1964-05-29
Abstract
No abstract record available.
Inventors
- 👤 William A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/34; F25B41/345; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10T; Y10T137/00; Y10T137/1842; Y10T137/1939; Y10T137/1963; Y10T137/4673; Y10T137/479; Y10T137/7722; Y10T137/7737; Y10T137/8593; Y10T137/877; Y10T137/87829
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1117738A
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US1202895A
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US2144898A
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US2182718A
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US2261562A
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US2289456A
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US2353848A
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US2328874A
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US2358828A
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US2394105A
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US2432859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |