US4438280A
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Bis-(maleamic acid) derivatives of triamines
Assignee: Plastics Engineering Co
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Filing: 1982-07-12
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Granted: 1984-03-20
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Expires: 2002-07-12
Abstract
Abstract The compositions described herein comprise polyimides having bis-maleimide terminal groups and having the formula: ##STR1## wherein Q is a trivalent aromatic radical, Ar is a divalent aromatic radical, Ar" is a tetravalent aromatic radical and n has a value of 0-20. Derivatives may be made of these compounds by homopolymerization, copolymerization with other copolymerizable materials and by reaction with Diels-Alder reactable materials.
Inventors
- 👤 Walter J. Monacelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:11
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/126; C08G73/127; C08G73/1067; C08G73/1071; C08G73/128
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
A bis(maleamic acid) derivative of a triamine having the formula: ##STR32## wherein Q is a trivalent benzenoid aromatic radical.
Claim 2
Dependent Claim
19 words
A bis(maleamic acid) derivative of a triamine having the formula: ##STR32## wherein Q is a trivalent benzenoid aromatic radical.
Claim 3
Dependent Claim
26 words
A bis(maleamic acid) derivative of claim 1, in which each of the valences of Q is attached to a different benzenoid nucleus in said Q radical.
Claim 4
Dependent Claim
18 words
A bis(maleamic acid) derivative of claim 1, in which said Q radical is the residue of 2,4-bis(p-aminobenzyl) aniline.
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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |