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Patent US4703098A successfully refreshed from Google Patents.
US4703098A
Expired / Lapsed
US
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Metathesis polymerization of thermally oligomerized dicyclopentadiene
Assignee: Metton America Inc
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Filing: 1987-02-26
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Granted: 1987-10-27
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Expires: 2007-02-26
Abstract
Abstract This invention teaches the preparation of crosslinked copolymers of dicyclopentadiene and higher oligomers of cyclopentadiene. Such copolymers are characterized by having significantly higher heat distortion temperatures and glass transition temperatures than crosslinked dicyclopentadiene homopolymer.
Inventors
- 👤 Albert S. Matlack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:39
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A crosslinked copolymer comprising about 40 to 95% by weight, based on total copolymer weight, of repeating units derived from dicyclopentadiene and about 60 to 5% by weight of repeating units derived from higher cyclopentadiene oligomers.
Claim 2
Dependent Claim
36 words
A crosslinked copolymer comprising about 40 to 95% by weight, based on total copolymer weight, of repeating units derived from dicyclopentadiene and about 60 to 5% by weight of repeating units derived from higher cyclopentadiene oligomers.
Claim 3
Dependent Claim
17 words
The copolymer of claim 1 wherein at least about 85% of the higher cyclopentadiene oligomers is tricyclopentadiene.
Claim 4
Dependent Claim
17 words
The copolymer of claim 1 wherein at least about 90% of the higher cyclopentadiene oligomers is tricyclopentadiene.
References Cited (Backward Citations)
US4400340A
Cited
US4558107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |