Patent US2451999A successfully refreshed from Google Patents.
US2451999A
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Hydraulic fluids
Assignee: EIDP Inc
•
Filing: 1944-09-28
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Granted: 1948-10-19
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Expires: 1964-09-28
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:36
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/042; C10M2201/08; C10M2201/082; C10M2201/083; C10M2201/086; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2207/046; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/124; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/2895; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/108; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779460A
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US1984421A
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US2090263A
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US2102638A
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US2169231A
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US2205183A
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US2238045A
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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) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |