Patent US2802344A successfully refreshed from Google Patents.
US2802344A
Expired / Lapsed
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Electrodialysis of solutions in absorption refrigeration
Assignee: Eureka Williams Co
•
Filing: 1953-07-08
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Granted: 1957-08-13
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Expires: 1973-07-08
Abstract
No abstract record available.
Inventors
- 👤 Robert R Witherell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:52
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; B01D61/46; B01D61/463; B01D61/422; B01D61/423; F; F25; F25B; F25B15/00; F25B15/14
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |