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US4894186A
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Substituted pyrazoline having non-linear optical properties
Assignee: Imperial Chemical Industries Ltd
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Filing: 1988-09-23
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Granted: 1990-01-16
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Expires: 2008-09-23
Abstract
Abstract A compound of the formula: ##STR1## wherein E is an ethenyl group of the formula: ##STR2## in which X is H when Y is NO 2 ; Y is H when X is NO 2 ; or X is CN when Y is CN which has the capacity to form a crystal in which the molecules are aligned substantially in the same manner giving it non-linear optical properties. The crystalline product is thus adapted for use in devices exhibiting non-linear optical effects.
Inventors
- 👤 Paul F. Gordon
- 👤 Brian Bothwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:47
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; C09; C09K; C09K19/00; C09K19/04; C09K19/06; C09K19/34; C09K19/3441; C09K19/3483; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; G02F1/3612
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A crystal of a compound of the formula: ##STR5## wherein E is an ethenyl group of the formula: ##STR6## in which X is H and Y is NO 2 ; Y is H and X is NO 2 ; or X is CN and Y is CN in which a substantial proportion of the molecules of the defined compound are aligned in the same manner so that the crystal has non-linear optical properties.
Claim 2
Dependent Claim
73 words
A crystal of a compound of the formula: ##STR5## wherein E is an ethenyl group of the formula: ##STR6## in which X is H and Y is NO 2 ; Y is H and X is NO 2 ; or X is CN and Y is CN in which a substantial proportion of the molecules of the defined compound are aligned in the same manner so that the crystal has non-linear optical properties.
Claim 3
Dependent Claim
15 words
A non-linear optical element comprising as the active species a compound according to claim 1.
Claim 4
Dependent Claim
16 words
A non-linear optical element comprising a chemically inert medium containing a compound according to claim 1.
Claim 5
Dependent Claim
27 words
A non-linear optical element comprising a reflecting or transparent substrate carrying a superficial coating comprising one or more ordered layers of a compound according to claim 1.
Claim 6
Dependent Claim
16 words
A crystal according to claim 1 wherein X is H and Y is NO 2 .
Claim 7
Dependent Claim
13 words
A crystal according to claim 1 wherein X and Y are both CN.
References Cited (Backward Citations)
US4780543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-15 | 1993-07-17 | 1994-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-15 | 1997-07-17 | 1998-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-15 | 2001-07-17 | 2002-01-16 | $7700.00 | Window Closed / Lapsed |