US4849500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide from diacetylene dicarboxylic acid compound
Assignee: Verizon Laboratories Inc
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Filing: 1986-03-07
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Granted: 1989-07-18
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Expires: 2006-03-07
Abstract
Abstract Polyamide compositions which contain as part of their repeat structure a reactive diacetylene groups are disclosed. The cross-polymerized products of these polyamides are thermochromic polydiacetylene compounds. The compositions of the present invention do not exhibit a hysteresis effect during temperature cycling.
Inventors
- 👤 Michael F. Rubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16; Y; Y10; Y10S; Y10S435/00; Y10S435/808
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
A polyamide-diacetylene having repeat units of the following formula: ##STR7## wherein n is an integer between 3 and 10 and R is an organic radical.
Claim 2
Dependent Claim
25 words
A polyamide-diacetylene having repeat units of the following formula: ##STR7## wherein n is an integer between 3 and 10 and R is an organic radical.
Claim 3
Dependent Claim
14 words
A polyamide-diacetylene as in claim 1 wherein R is (CH 2 ) 6 .
Claim 4
Dependent Claim
10 words
A polyamide-diacetylene as in claim 1 wherein R is ##STR8##
Claim 5
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR9##
Claim 6
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR9##
Claim 7
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR10##
Claim 8
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR10##
Claim 9
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR11##
Claim 10
Dependent Claim
10 words
A polyamide-diacetylene having repeat units of the following formula: ##STR11##
References Cited (Backward Citations)
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Cited
US3709860A
Cited
US3999946A
Cited
US4215208A
Cited
US4367329A
Cited
US4663425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |