US2539422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil
Assignee: Ward Baking Co
•
Filing: 1947-07-23
•
Granted: 1951-01-30
•
Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Charles
- 👤 Thomas R Schweitzer
- 👤 Anwar Mohammad Haider
- 👤 Dalby Gaston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/40; C10M2207/404; C10M2219/00; C10M2219/04; C10M2219/042; C10N; C10N2040/00; C10N2040/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN EMULSION RESISTANT CRANK CASE OIL CONSISTING OF CRANK CASE OIL AND FROM 0.05% TO ABOUT 1% OF THE COMPOUND HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
24 words
AN EMULSION RESISTANT CRANK CASE OIL CONSISTING OF CRANK CASE OIL AND FROM 0.05% TO ABOUT 1% OF THE COMPOUND HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |