US3896083A
Expired / Lapsed
US
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Heterocyclic polymers from triaminopyradine compounds
Assignee: Horizons Inc
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Filing: 1974-03-04
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Granted: 1975-07-22
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Expires: 1994-03-04
Abstract
Abstract Thermally stable polymers are obtained by cyclodehydration of the precyclized prepolymers which are produced by reaction of acid derivatives such as bis(acid halides), mono(acid halide)anhydrides and dianhydrides, with specific triaminopyridine compounds.
Inventors
- 👤 Arthur H Gerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/20; C08G73/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
13 words
PRECYCLIZED POLYAMIDES CONSISTING ESSENTIALLY OF AT LEAST ONE OF THE FOLLOWING RECURRING FORMULAE:
Claim 2
Dependent Claim
13 words
PRECYCLIZED POLYAMIDES CONSISTING ESSENTIALLY OF AT LEAST ONE OF THE FOLLOWING RECURRING FORMULAE:
Claim 3
Dependent Claim
17 words
Precyclized polyamides and acid salts thereof of claim 1 consisting of recurring units represented by the formula:
Claim 4
Dependent Claim
32 words
CYCLIZED HETEROCYCLIC POLYMERS PREPARED BY CYCLODEHYDRATION OF THE POLYAMIDES AND ACID SALTS THEREOF OF CLAIM 1 AND WHICH CONTAIN RECURRING STRUCTURAL UNITS CONSISTING ESSENTIALLY OF AT LEAST ONE OF THE FOLLOWING FORMULAE:
Claim 5
Dependent Claim
18 words
The precyclized polyamides and acid salts thereof of claim 1 wherein at least a portion of the radical
Claim 6
Dependent Claim
7 words
The polymers of claim 4 after cyclodehydration.
Claim 7
Dependent Claim
14 words
The precyclized polyamides of claim 1 wherein at least a portion of the radical
Claim 8
Dependent Claim
7 words
The polymers of claim 6 after cyclodehyDration.
Claim 9
Dependent Claim
25 words
A process for producing the precyclized polyamides of claim 1 which comprises reacting at least one acid salt of a triminopyridine represented by the formula
Claim 10
Dependent Claim
31 words
The process of claim 8 wherein the pyridyl acid salt is partially replaced by at least one acid salt of an aromatic diamine or an aromatic amine represented by the formulae:
Claim 11
Dependent Claim
26 words
The polymers of claim 3 in which at least some of the R2 groups are selected from the group consisting of allyl, crotyl, C6H5CH CH-C6H4-, and
References Cited (Backward Citations)
US3740140A
Cited
US3804804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |