US4031092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,3-Bis-(carboxy-phenylamino)-s-triazines
Assignee: 3M Co
•
Filing: 1975-06-16
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Granted: 1977-06-21
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Expires: 1995-06-16
Abstract
Abstract Cyanuric halide is successively reacted with two moles of carboxy substituted aromatic amine and one mole of quaternizing agent such as pyridine and dissolved, e.g., in dilute ammonium hydroxide. At certain concentrations as the solution evaporates, it becomes nematic. The solution is evaporated on an oriented substrate so that the residue is anisotropic and is finally frozen in a resinous form which shows birefringence. The substrate and coating is valuable as a fractional wave plate.
Inventors
- 👤 Elwood L. Strebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3475; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3016
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
33 words
As a composition of matter substantially chlorine free 1,3-bis(carboxyphenylamino)triazine 5-pyridinium complex forming lyotropic nematic phase in concentrated solution in aqueous ammonium hydroxide and having nuclear magnetic resonance spectra consistent with the structures: ##STR6##
Claim 2
Dependent Claim
33 words
As a composition of matter substantially chlorine free 1,3-bis(carboxyphenylamino)triazine 5-pyridinium complex forming lyotropic nematic phase in concentrated solution in aqueous ammonium hydroxide and having nuclear magnetic resonance spectra consistent with the structures: ##STR6##
Claim 3
Dependent Claim
7 words
1,3-Bis(carboxyphenylamino)triazine-5-pyridinium complex represented by the formula: ##STR7##
Claim 4
Dependent Claim
7 words
1,3-Bis(carboxyphenylamino)triazine-5-pyridinium complex represented by the formula: ##STR7##
References Cited (Backward Citations)
US3116275A
Cited
US3867383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |