Patent US1857810A successfully refreshed from Google Patents.
US1857810A
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US
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Filtration
Assignee: Texaco Inc
•
Filing: 1929-01-24
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Granted: 1932-05-10
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Expires: 1949-01-24
Abstract
No abstract record available.
Inventors
- 👤 William P Gee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:33
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/025; B; B01; B01D; B01D33/00; B01D33/15; B01D33/21; B01D33/58; B01D33/60; B01D33/62; B01D33/66; B01D33/663; B01D33/80; B01D33/82; B01D37/00; B01D37/02; B01D2201/00; B01D2201/08; B01D2201/085; B01D2201/20; B01D2201/204; B01D2201/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-05-10 | 1935-11-09 | 1936-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-05-10 | 1939-11-09 | 1940-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-05-10 | 1943-11-09 | 1944-05-10 | $7700.00 | Window Closed / Lapsed |