Patent US2461334A successfully refreshed from Google Patents.
US2461334A
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Liquid treating unit
Assignee: Servel Inc
•
Filing: 1944-12-01
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Granted: 1949-02-08
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Expires: 1964-12-01
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Major
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:49
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; C02F1/686; Y; Y10; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2761; Y10T137/2774
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1577157A
Cited
US831059A
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US997318A
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US1150673A
Cited
US1745141A
Cited
US1883139A
Cited
US1989380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |