US4162265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic enyne compounds and their synthesis
Assignee: United States Department of the Air Force
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Filing: 1978-09-27
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Granted: 1979-07-24
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Expires: 1998-09-27
Abstract
Abstract Difunctional aromatic enyne compounds are prepared by the catalytic coupling of substituted monoethynyl compounds. The compounds are useful as monomers in polycondensation reactions for the preparation of high molecular weight, thermally stable thermoplastic polymers. On thermal treatment of the polymers, the enyne groups along the polymer backbones react by interchain reactions to provide the solvent and craze resistance required for application as structural materials.
Inventors
- 👤 Fred E. Arnold
- 👤 Bruce A. Reinhardt
- 👤 Frederick L. Hedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:04
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/84; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
19 words
A difunctional aromatic enyne compound having the following formula: ##STR11## in which R is NH 2 , OH ##STR12##
Claim 2
Dependent Claim
19 words
A difunctional aromatic enyne compound having the following formula: ##STR11## in which R is NH 2 , OH ##STR12##
Claim 3
Dependent Claim
13 words
The compound according to claim 1 in which R is NH 2 .
Claim 4
Dependent Claim
11 words
The compound according to claim 1 in which R is OH.
Claim 5
Dependent Claim
11 words
The compound according to claim 1 in which R is ##STR13##
References Cited (Backward Citations)
US2586487A
Cited
US2852556A
Cited
FR1534311A
Cited
US3624162A
Cited
US3499763A
Cited
US4082806A
Cited
US4122026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |