Patent US4112239A successfully refreshed from Google Patents.
US4112239A
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US
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Mesogenic biphenyl benzoates
Assignee: Thales SA
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Filing: 1976-01-07
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Granted: 1978-09-05
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Expires: 1996-01-07
Abstract
Abstract The present invention relates to a family of substances which, in different temperature ranges, exhibit smectic or nematic properties of mesomorphism. Their general formula is: ##STR1## where R designates one of the three radicals: C.sub.n H.sub.2n + 1 ; ##STR2## (n being a whole number ranging from 1 to 20) and X designatating a halogen (Br preferably) or the nitrile radical C N.
Inventors
- 👤 Jean Claude Dubois
- 👤 Francoise Barre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/08; C09K19/10; C09K19/12; C09K19/14; C09K19/20; C09K19/2007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A mesogenic compound of the formula: ##STR13## wherein R is selected from the group consisting of ##STR14## and n is a whole number from 1 to 20.
Claim 2
Dependent Claim
27 words
A mesogenic compound of the formula: ##STR13## wherein R is selected from the group consisting of ##STR14## and n is a whole number from 1 to 20.
Claim 3
Dependent Claim
27 words
A mesogenic compound of the formula: ##STR15## wherein R is selected from the group consisting of ##STR16## and n is a whole number from 1 to 20.
Claim 4
Dependent Claim
27 words
A mesogenic compound of the formula: ##STR15## wherein R is selected from the group consisting of ##STR16## and n is a whole number from 1 to 20.
Claim 5
Dependent Claim
10 words
The mesogenic compound of claim 1 wherein R is ##STR17##
References Cited (Backward Citations)
US3622619A
Cited
US3660372A
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US3772389A
Cited
US3947375A
Cited
US3952046A
Cited
US3951846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |