US2620353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic oil-soluble alkyl diphenylalkane sulfonates
Assignee: Standard Oil Development Co
•
Filing: 1950-11-01
•
Granted: 1952-12-02
•
Expires: 1970-11-01
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Lippincott
- 👤 Baumgartner Frederick Neil
- 👤 Howard L Yowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:16
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/32; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
AS NEW CHEMICALS, COMPOUNDS CORRESPONDING TO THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
9 words
AS NEW CHEMICALS, COMPOUNDS CORRESPONDING TO THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US1781981A
Cited
US2004546A
Cited
US2126232A
Cited
US2161173A
Cited
US2180314A
Cited
US2529523A
Cited
US2527426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |