Patent US4711964A successfully refreshed from Google Patents.
US4711964A
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Bisdiene from bis-benzocyclobutene compound
Assignee: United States Department of the Air Force
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Filing: 1986-05-08
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Granted: 1987-12-08
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Expires: 2006-05-08
Abstract
Abstract Resins are prepared by polymerization of compounds of the formula <IMAGE> (I) where R is a divalent linking group. Blends of a compound of the formula (I) as defined above and a bis-maleimide of the formula <IMAGE> (VII) where Ar' is an aromatic linking group.
Inventors
- 👤 Loon-Seng Tan
- 👤 Fred E. Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:12
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
12 words
A compound of the formula ##STR18## where R is divalent linking group.
Claim 2
Dependent Claim
12 words
A compound of the formula ##STR18## where R is divalent linking group.
Claim 3
Dependent Claim
21 words
The compound of claim 1 wherein said compound is represented by the formula ##STR19## where R is a divalvent linking group.
Claim 4
Dependent Claim
16 words
The compound of claim 2 wherein said divalent linking group is an aromatic divalent linking group.
Claim 5
Dependent Claim
40 words
The compound of claim 2 wherein R is selected from the group consisting of --C(CF 3 ) 2 --, --C(CH 3 ) 2 --, --CH 2 --, --O--, --S--, --CO-- and --SO 2 --, or R represents a direct bond.
Claim 6
Dependent Claim
48 words
The compound of claim 3 wherein R is represented by the formula ##STR20## where W is selected from the group consisting of --C(CF 3 ) 2 --, --C(CH 3 ) 2 --, --CH 2 --, --O--, --S--, --CO-- and --SO 2 --, or R represents a direct bond.
Claim 7
Dependent Claim
48 words
The compound of claim 3 wherein R is represented by the formula ##STR21## where X is selected from the group consisting of --C(CF 3 ) 2 --, --C(CH 3 ) 2 --, --CH 2 --, --O--, --S--, --CO-- and --SO 2 --, or R represents a direct bond.
Claim 8
Dependent Claim
109 words
The compound of claim 3 wherein R is represented by the formula ##STR22## where R' is selected from the group consisting of --C(CF 3 ) 2 --, --C(CH 3 ) 2 --, --CH 2 --, --O--, --S--, --CO-- and --SO 2 --, or R represents a direct bond, n is 1 to 4, and Ar is selected from the group consisting of a meta phenylene group, a para phenylene group, and the formula ##STR23## where X is selected from the group consisting of --C(CF 3 ) 2 --, --C(CH 3 ) 2 --, --CH 2 --, --O--, --S--, --CO-- and --SO 2 --, or R represents a direct bond.
Claim 9
Dependent Claim
13 words
The compound of claim 4 wherein R is --C(CF 3 ) 2 --.
Claim 10
Dependent Claim
13 words
The compound of claim 5 wherein W is --C(CF 3 ) 2 --.
Claim 11
Dependent Claim
11 words
The compound of claim 5 wherein W is --SO 2 --.
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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |