US2504435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling refrigeration
Assignee: General Controls Co
•
Filing: 1942-11-24
•
Granted: 1950-04-18
•
Expires: 1962-11-24
Abstract
No abstract record available.
Inventors
- 👤 Harold J Matteson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:04
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/34; F25B41/345; F25B41/39; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/87507; Y10T137/87539
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US762249A
Cited
US1804462A
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US1853273A
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US1920505A
Cited
US1997879A
Cited
US2146483A
Cited
US2289923A
Cited
US2167399A
Cited
US2195220A
Cited
US2290322A
Cited
US2339353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |