US4661576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermotropic polymers with lateral chains having a chiral structure and process and their manufacture
Assignee: Thales SA
•
Filing: 1985-11-12
•
Granted: 1987-04-28
•
Expires: 2005-11-12
Abstract
Abstract The invention concerns a family of thermotropic polymers of the mesogenic the lateral group of which have at least one mesomorphous phase and obtained from a monomer having the general formula: <IMAGE> +TR <IMAGE> in which R1=CH3, Cl or H and 2</=n</=11.
Inventors
- 👤 Guy Decobert
- 👤 Jean C. Dubois
- 👤 Francoise Soyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3857
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
A thermotropic polymer of the mesogenic lateral group type having at least one mesomorphous phase through copolymerization of a monomer M 1 of the formula: ##STR24## in which R 1 is CH 3 or H with n=11 or R 1 is Cl with 2≦n≦11, with a second monomer M 2 of the formula: ##STR25## which provides a copolymer product having at least one nematic phase with the proportion of said monomers in the polymer being such that the existence of a cholesteric phase is allowed.
Claim 2
Dependent Claim
85 words
A thermotropic polymer of the mesogenic lateral group type having at least one mesomorphous phase through copolymerization of a monomer M 1 of the formula: ##STR24## in which R 1 is CH 3 or H with n=11 or R 1 is Cl with 2≦n≦11, with a second monomer M 2 of the formula: ##STR25## which provides a copolymer product having at least one nematic phase with the proportion of said monomers in the polymer being such that the existence of a cholesteric phase is allowed.
Claim 3
Dependent Claim
49 words
A thermotropic polymer according to claim 1, wherein: in the said monomer M 1 :R 1 =CH 3 and n=11, the said second monomer M 2 has the chemical formula ##STR26## the proportions of the monomers M 1 and M 2 in the polymer being respectively 0.05 and 0.95.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |