US3668259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,3,3-TRIMETHYL-BIS ({60 -t-BUTYLPEROXYISOPROPYL)-1-PHENYLINDANE
Assignee: Hercules LLC
•
Filing: 1969-12-31
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Granted: 1972-06-06
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Expires: 1989-12-31
Abstract
Abstract 1,3,3-Trimethyl-bis( Alpha -t-butylperoxyisopropyl)-1phenylindanes in which the Alpha -t-butylperoxyisopropyl groups are attached in the 6- and 4''-, 6- and 3''-, 5- and 4''-, and 5and 3''-, 7- and 4''-, or 7- and 3''-positions are heated in contact with curable polymers whereby crosslinking of the polymer is effected.
Inventors
- 👤 Frederick G Schappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:50
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/16; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C07C2602/00; C07C2602/02; C07C2602/04; C07C2602/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
16 words
A compound of claim 1 in which a t-butylperoxyisopropyl group is attached to each benzene ring.
Claim 2
Dependent Claim
17 words
A compound of claim 2 in which the t-butylperoxyisopropyl groups are attached at positions 6 and 4''.
Claim 3
Dependent Claim
17 words
A compound of claim 2 in which the t-butylperoxyisopropyl groups are attached at positions 5 and 3''.
Claim 4
Dependent Claim
17 words
A compound of claim 2 in which the t-butylperoxyisopropyl groups are attached at positions 7 and 3''.
Claim 5
Dependent Claim
31 words
A mixture of isomeric compounds of claim 2 in which the t-butylperoxyisopropyl groups are attached at positions 5 and 3'' in one isomer and at 7 and 3'' in the other.
Claim 6
Dependent Claim
36 words
A mixture of isomeric compounds of claim 2 in which the t-butylperoxyisopropyl groups are attached at positions 6 and 4'', 6 and 3'', 5 and 4'', 5 and 3'' 7 and 4'', and 7 and 3''.
References Cited (Backward Citations)
US3402205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |