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US2437577A
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Absorption refrigeration system including condenser pressure control means
Assignee: Eureka Williams Co
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Filing: 1944-03-27
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Granted: 1948-03-09
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Expires: 1964-03-27
Abstract
No abstract record available.
Inventors
- 👤 Walter W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:03
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/8593; Y10T137/86493; Y10T137/877; Y10T137/87708; Y10T137/87748; Y10T137/87917; Y10T137/87981; Y10T137/87997
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992048A
Cited
US1937565A
Cited
US2042694A
Cited
US2298924A
Cited
US2365797A
Cited
US2378177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |