US3270072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibited cumene
Assignee: Texaco Inc
•
Filing: 1965-09-09
•
Granted: 1966-08-30
•
Expires: 1985-09-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph Pesacreta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:51
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A PROCESS FOR INHIBITING THE AUTOOXIDATION OF CUMENE WHICH COMPRISES ADDING PHENOL TO A QUANTITY OF CUMENE WHEREIN THE CONCENTRATION OF CUMENE HYDROPEROXIDE IN SAID CUMENE IS LESS THAN 75 P.P.M. AND WHEREIN THE CONCENTRATION OF SAID PHENOL IN THE RESULTING MIXTURE IS BETWEEN ABOUT 20 P.P.M. AND ABOUT 100 P.P.M.
Claim 2
Dependent Claim
51 words
A PROCESS FOR INHIBITING THE AUTOOXIDATION OF CUMENE WHICH COMPRISES ADDING PHENOL TO A QUANTITY OF CUMENE WHEREIN THE CONCENTRATION OF CUMENE HYDROPEROXIDE IN SAID CUMENE IS LESS THAN 75 P.P.M. AND WHEREIN THE CONCENTRATION OF SAID PHENOL IN THE RESULTING MIXTURE IS BETWEEN ABOUT 20 P.P.M. AND ABOUT 100 P.P.M.
References Cited (Backward Citations)
US1761810A
Cited
US2726999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |