US2137783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant
Assignee: Lubrizol Development Corp
•
Filing: 1937-04-14
•
Granted: 1938-11-22
•
Expires: 1957-04-14
Abstract
No abstract record available.
Inventors
- 👤 Carl F Prutton
- 👤 Albert K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
C; C10; C10M; C10M131/00; C10M131/08; C10M131/10; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/044; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/08; C10M2215/082; C10M2215/14; C10M2215/16; C10M2215/18; C10M2215/182; C10M2215/20; C10M2215/202; C10M2215/204; C10M2215/24; C10M2215/28; C10M2219/00; C10M2219/04; C10M2219/042; C10M2219/044; C10M2219/06; C10M2219/08; C10M2219/082; C10M2219/086; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/047; C10M2227/00; C10M2227/06; C10N; C10N2010/00; C10N2010/10; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
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) | 1941-11-21 | 1942-05-23 | 1942-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-21 | 1946-05-23 | 1946-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-21 | 1950-05-23 | 1950-11-22 | $7700.00 | Window Closed / Lapsed |