US2258591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil composition
Assignee: Shell Development Co
•
Filing: 1939-11-27
•
Granted: 1941-10-14
•
Expires: 1959-11-27
Abstract
No abstract record available.
Inventors
- 👤 Moser Franz Rudolf
- 👤 Dijksman Albert Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:38
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/26; C10M129/48; C10M129/54; C10M129/50; C10M131/00; C10M131/08; C10M131/12; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/10; C10M2207/14; C10M2207/141; C10M2207/142; C10M2207/144; C10M2207/146; C10M2207/26; C10M2207/262; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2211/00; C10M2211/04; C10M2211/044; C10M2215/00; C10M2215/02; C10M2215/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/14; C10N2010/16; C10N2070/00; C10N2070/02
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) | 1944-10-13 | 1945-04-14 | 1945-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-10-13 | 1949-04-14 | 1949-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-10-13 | 1953-04-14 | 1953-10-14 | $7700.00 | Window Closed / Lapsed |