Patent US2169634A successfully refreshed from Google Patents.
US2169634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions, inhibitors therefor, and methods of manufacturing the same
Assignee: Gulf Oil Corp
•
Filing: 1936-09-17
•
Granted: 1939-08-15
•
Expires: 1956-09-17
Abstract
No abstract record available.
Inventors
- 👤 Cantrell Troy Lee
- 👤 Turner James Otho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:38
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2223/00; C10M2223/12; C10M2223/121; C10N; C10N2040/00; C10N2040/02; C10N2040/135
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-08-14 | 1943-02-13 | 1943-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-14 | 1947-02-13 | 1947-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-14 | 1951-02-13 | 1951-08-15 | $7700.00 | Window Closed / Lapsed |