US3288864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of isopropenyl phenols and of linear dimers thereof
Assignee: Union Carbide Corp
•
Filing: 1962-05-11
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Granted: 1966-11-29
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Expires: 1982-05-11
Abstract
No abstract record available.
Inventors
- 👤 Alford G Farnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:38
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C37/50; C07C37/52; C07C39/00; C07C39/205; C07C39/21; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
PROCESS FOR PREPARING A LINEAR TRIMER WHICH COMPRISES SELF-CONDENSING, IN A REACTION MEDIUM HAVING A PH OF LESS THAN ABOUT 2, A COMPOUND WHICH IS A MEMBER OF THE GROUP CONSISTING OF ISOPROPENYL PHENOLS HAVING THE FORMULA:
Claim 2
Dependent Claim
37 words
PROCESS FOR PREPARING A LINEAR TRIMER WHICH COMPRISES SELF-CONDENSING, IN A REACTION MEDIUM HAVING A PH OF LESS THAN ABOUT 2, A COMPOUND WHICH IS A MEMBER OF THE GROUP CONSISTING OF ISOPROPENYL PHENOLS HAVING THE FORMULA:
Claim 3
Dependent Claim
6 words
A LINEAR TRIMER HAVING THE FORMULA:
Claim 4
Dependent Claim
6 words
A LINEAR TRIMER HAVING THE FORMULA:
Claim 5
Dependent Claim
38 words
PROCESS FOR THE PREPARATION OF A DIHYDRIC, POLYNUCLEAR PHENOL WHICH COMPRISES REACTING, IN A REACTION MEDIUM HAVING A PH OF LESS THAN ABOUT 2, A LINEAR TRIMER AS DEFINED IN CLAIM 7 WITH A PHENOL HAVING THE FORMULA:
Claim 6
Dependent Claim
26 words
PROCESS FOR PREPARING A TRISPHENOL WHICH COMPRISES REACTING, IN A REACTION MEDIUM HAVING A PH OF LESS THAN ABOUT 2, A LINEAR DIMER HAVING THE FORMULA:
Claim 7
Dependent Claim
26 words
PROCESS FOR PREPARING A TRISPHENOL WHICH COMPRISES REACTING, IN A REACTION MEDIUM HAVING A PH OF LESS THAN ABOUT 2, A LINEAR DIMER HAVING THE FORMULA:
References Cited (Backward Citations)
US2191831A
Cited
GB600985A
Cited
DE1004168B
Cited
US2891092A
Cited
US2979534A
Cited
FR1280765A
Cited
BE611184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |