Patent US4936848A successfully refreshed from Google Patents.
US2575195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dibasic acid esters and method for producing them
Assignee: Standard Oil Development Co
•
Filing: 1948-10-01
•
Granted: 1951-11-13
•
Expires: 1968-10-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
C; C07; C07C; C07C323/00; C10; C10M; C10M3/00; C10M2207/00; C10M2207/28; C10M2207/30; C10M2209/00; C10M2209/10; C10M2209/11; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |