US3183248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of trimellitic anhydride
Assignee: Standard Oil Co
•
Filing: 1961-08-02
•
Granted: 1965-05-11
•
Expires: 1981-08-02
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Hirsch
- 👤 Richard E Van Strien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:36
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/89; C07C; C07C69/00; C07C69/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF FORMULA I
Claim 2
Dependent Claim
13 words
A COMPOUND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF FORMULA I
References Cited (Backward Citations)
US2822348A
Cited
US3063969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |