Patent US3888892A successfully refreshed from Google Patents.
US3888892A
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Liquid crystalline compounds
Assignee: Xerox Corp
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Filing: 1972-10-24
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Granted: 1975-06-10
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Expires: 1992-10-24
Abstract
Abstract Novel liquid crystalline compounds having a cholesteric mesophase are disclosed. The compounds have a relatively low cholesteric mesomorphic temperature range, are typically righthanded and have relatively small effective pitch. Methods of preparing the compounds and uses thereof are also described.
Inventors
- 👤 Lewis B Leder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:04
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/36; C07; C07J; C07J9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
13 words
LIQUID CRYSTALLINE COMPOUNDS HAVING A CHLOESTERIC MESOPHASE WHICH ARE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
13 words
LIQUID CRYSTALLINE COMPOUNDS HAVING A CHLOESTERIC MESOPHASE WHICH ARE REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
12 words
The compounds as defined in claim 1 wherein R represents a halogen.
Claim 4
Dependent Claim
21 words
The compounds as defined in claim 1 where R represents an aliphatic ester radical having from three to fifteen carbon atoms.
Claim 5
Dependent Claim
21 words
The compounds as defined in claim 1 wherein R represents a carbonate radical having up to and including nine carbon atoms.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |