US4916211A
Expired / Lapsed
US
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Thermochromic cross polymerized polyamide-diacetylene compound
Assignee: Verizon Laboratories Inc
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Filing: 1988-11-03
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Granted: 1990-04-10
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Expires: 2008-11-03
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
2026-10-30 05:51
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; G; G01; G01K; G01K11/00; G01K11/12; G01K11/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
34 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR6## wherein n is an integer between 3 and 10 and R is an organic radical.
Claim 2
Dependent Claim
34 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR6## wherein n is an integer between 3 and 10 and R is an organic radical.
Claim 3
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR7##
Claim 4
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR7##
Claim 5
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR8##
Claim 6
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR8##
Claim 7
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR9##
Claim 8
Dependent Claim
19 words
A thermochromic polyamide produced by cross-polymerizing diacetylene units of a polyamide-diacetylene having repeat units of the following formula: ##STR9##
References Cited (Backward Citations)
US4814404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |