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US3674749A
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Polyiminoquinazolinediones
Assignee: EIDP Inc
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Filing: 1970-08-26
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Granted: 1972-07-04
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Expires: 1990-08-26
Abstract
Abstract A novel polyiminoquinazolinedione composition which is the reaction product of a multifunctional isocyanate and a multifunctional o-aminonitrile.
Inventors
- 👤 James M Craven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3838; C08G18/70; C08G18/72; C08G18/77; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694; Y; Y10; Y10S; Y10S528/00; Y10S528/905
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
6 words
The polymer of claim 1 wherein
Claim 2
Dependent Claim
14 words
The polymer of claim 1 wherein R is selected from the group consisting of
Claim 3
Dependent Claim
14 words
The polymer of claim 1 wherein R is selected from the group consisting of
Claim 4
Dependent Claim
8 words
The polymer of claim 1 wherein R is
Claim 5
Dependent Claim
51 words
A composition thermally convertible to an infusible polymer comprising at least one isocyanate and at least one o-aminonitrile, said isocyanate having the formula R4 - (NCO)n where n is an integer greater than 1 and where R4 is selected from the group consisting of an alkylene radical having 2-40 carbon atoms,
Claim 6
Dependent Claim
35 words
The precursor composition of claim 6 wherein the isocyanate forms about 40 to 60 mol percent of the said composition and wherein the o-amino-nitrile forms from about 40 to 60 mol percent of said composition.
Claim 7
Dependent Claim
17 words
A precursor thermally convertible to an infusible polymer consisting essentially of the structure described by the formula
Claim 8
Dependent Claim
21 words
The composition of claim 6 wherein there is also present the compound consisting essentially of the structure described by the formula
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |