Patent US4614619A successfully refreshed from Google Patents.
US4614619A
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Liquid crystalline materials useful to prepare polymeric films
Assignee: ADVANTAGE TECHNOLOGY Inc
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Filing: 1985-05-29
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Granted: 1986-09-30
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Expires: 2005-05-29
Abstract
Abstract The present invention concerns novel cholesteric liquid crystalline monomers which are useful to form polymeric materials having unique optical properties.
Inventors
- 👤 Paul J. Shannon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:51
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/32; C07; C07J; C07J9/00; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/28; C08F20/30; C09K19/36; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3866; C09K2019/0444; C09K2019/0448
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
Compounds having the structure ##STR9## where R 1 =H or CH 3 , and R 2 =an alkylene chain having from 3-14 methylene or lower alkyl-substituted methylene groups.
Claim 2
Dependent Claim
28 words
Compounds having the structure ##STR9## where R 1 =H or CH 3 , and R 2 =an alkylene chain having from 3-14 methylene or lower alkyl-substituted methylene groups.
Claim 3
Dependent Claim
31 words
Compounds having the structure ##STR10## where R 1 =H or CH 3 , A=--R 3 O--, and R 3 =an alkylene chain having from 2-14 methylene or lower alkyl-substituted methylene groups.
Claim 4
Dependent Claim
31 words
Compounds having the structure ##STR10## where R 1 =H or CH 3 , A=--R 3 O--, and R 3 =an alkylene chain having from 2-14 methylene or lower alkyl-substituted methylene groups.
Claim 5
Dependent Claim
57 words
Compounds having the structure ##STR11## where R 1 =H or CH 3 , A=--R 4 O--, R 4 =an alkylene ether, diether or triether having a total of from 3-14 carbon atoms in the alkylene moieties, provided that the terminal alkylene moiety adjacent the carbonate moiety comprises not less than two carbon atoms, and y=0 or 1.
Claim 6
Dependent Claim
57 words
Compounds having the structure ##STR11## where R 1 =H or CH 3 , A=--R 4 O--, R 4 =an alkylene ether, diether or triether having a total of from 3-14 carbon atoms in the alkylene moieties, provided that the terminal alkylene moiety adjacent the carbonate moiety comprises not less than two carbon atoms, and y=0 or 1.
Claim 7
Dependent Claim
23 words
The compounds as set forth in claim 3 hereof wherein the alkylene moieties of R 4 are at least partially lower alkyl substituted.
References Cited (Backward Citations)
DE2226448A1
Cited
US3916002A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |