US2128574A
Expired / Lapsed
US
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Process for lubricant composition
Assignee: Shell Development Co
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Filing: 1936-10-19
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Granted: 1938-08-30
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Expires: 1956-10-19
Abstract
No abstract record available.
Inventors
- 👤 Adrianus Johannes Van Peski
- 👤 Coltof Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:36
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/125; C10M2207/129; C10M2207/24; C10M2209/00; C10M2209/02; C10M2209/10; C10N; C10N2030/00; C10N2030/12; C10N2060/00; C10N2060/04
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) | 1941-08-29 | 1942-02-28 | 1942-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-08-29 | 1946-02-28 | 1946-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-08-29 | 1950-02-28 | 1950-08-30 | $7700.00 | Window Closed / Lapsed |