US2632767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex phosphate ester synthetic lubricant
Assignee: Standard Oil Development Co
•
Filing: 1948-12-29
•
Granted: 1953-03-24
•
Expires: 1968-12-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul V Smith
- 👤 Jr Fred Knoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:22
CPC Classifications
C; C10; C10M; C10M3/00; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2225/00; C10M2225/02; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AS A NEW COMPOSITION OF MATTER A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
11 words
AS A NEW COMPOSITION OF MATTER A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
GB555192A
Cited
US2411671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |