US4965330A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Norbornene dicarboximide polymer
Assignee: Monsanto Co
•
Filing: 1988-10-07
•
Granted: 1990-10-23
•
Expires: 2008-10-07
Abstract
Abstract Polymerization of norbornene dicarboximide yields polymers of high Tg, e.g. greater than 170° C. Preferred polymers of N-phenyl norbornene dicarboximide exhibit Tg greater than 210°C.
Inventors
- 👤 Jawed Asrar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:24
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
39 words
A polymer comprising norbornene dicarboximide units essentially of the formula ##STR2## where R is phenyl or substituted phenyl; wherein said polymer has an number average molecular weight greater than about 6,000 and a Tg greater than about 200° C.
Claim 2
Dependent Claim
39 words
A polymer comprising norbornene dicarboximide units essentially of the formula ##STR2## where R is phenyl or substituted phenyl; wherein said polymer has an number average molecular weight greater than about 6,000 and a Tg greater than about 200° C.
Claim 3
Dependent Claim
12 words
Poly (N-phenyl norbornene dicarboximide) having a Tg greater than about 200° C.
Claim 4
Dependent Claim
12 words
Poly (N-phenyl norbornene dicarboximide) having a Tg greater than about 200° C.
Claim 5
Dependent Claim
25 words
A copolymer of N-phenyl norbornene dicarboximide having a number average molecular weight greater than about 8,000 and a T g of at least 170° C.
Claim 6
Dependent Claim
25 words
A copolymer of N-phenyl norbornene dicarboximide having a number average molecular weight greater than about 8,000 and a T g of at least 170° C.
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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |