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US2489281A
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Methacrylates in constant viscosity oils
Assignee: California Research LLC
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Filing: 1947-04-04
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Granted: 1949-11-29
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Expires: 1967-04-04
Abstract
No abstract record available.
Inventors
- 👤 Edward G Foehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:46
CPC Classifications
C; C10; C10M; C10M161/00; C10M2201/00; C10M2201/02; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2207/28; C10M2207/287; C10M2207/289; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/084; C10M2219/00; C10M2219/08; C10M2219/082; C10N; C10N2010/00; C10N2010/06; C10N2040/00; C10N2040/06; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2385697A
Cited
US2031986A
Cited
US2041076A
Cited
US2091423A
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US2122940A
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US2204601A
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US2227149A
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US2189873A
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US2212423A
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US2275123A
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US2274673A
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US2370299A
Cited
US2418894A
Cited
US2456642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |