Patent US2590148A successfully refreshed from Google Patents.
US2590148A
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US
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Assignee: Union Oil Company of California
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Filing: 1947-09-22
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Granted: 1952-03-25
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Expires: 1967-09-22
Abstract
No abstract record available.
Inventors
- 👤 Clyde H O Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:42
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; B; B01; B01J; B01J8/00; B01J8/08; B01J8/082; B01J2208/00; B01J2208/00008; B01J2208/0061; B01J2208/00743; B01J2208/00761
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US234747A
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US510954A
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US1115193A
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DE618502C
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US2304827A
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US2360787A
Cited
US2368672A
Cited
US2397566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |