US4927244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating medium
Assignee: Hoechst AG
•
Filing: 1988-04-05
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Granted: 1990-05-22
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Expires: 2008-04-05
Abstract
Abstract Use of compounds or mixtures of compounds which have a chiral, orthogonal, more highly ordered smectic phase in the range of said phase as switching or indicating medium. Compounds which have a chiral, orthogonal, more highly ordered smectic phase, in particular an S B * or an S E * phase, can be used in the range of said phase or phases as indicating or switching medium in electro-optical indicating or switching components (devices) which are based on the exploitation of the electroclinic effect.
Inventors
- 👤 Christian Bahr
- 👤 Gerd Heppke
- 👤 Detlef Lotzsch
- 👤 Hans-Rolf Dubal
- 👤 Claus Escher
- 👤 Dieter Ohlendorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:27
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/02; C07; C07D; C07D405/00; C07D405/02; C07D405/12; C07D303/00; C07D303/02; C07D303/48; C09K19/52; C09K19/58; C09K19/586; C09K19/588; G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/137; G02F1/139; G02F1/141; G02F1/1418; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/37
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A switching or indicating component which is based on the electroclinic effect, comprising as switching or indicating medium a compound or a mixture of compounds which are present in a chiral, orthogonal, more highly ordered smectic phase in the operational state of the switching or indicating component.
Claim 2
Dependent Claim
47 words
A switching or indicating component which is based on the electroclinic effect, comprising as switching or indicating medium a compound or a mixture of compounds which are present in a chiral, orthogonal, more highly ordered smectic phase in the operational state of the switching or indicating component.
Claim 3
Dependent Claim
23 words
The switching or indicating component as claimed in claim 1, wherein the phase is an S B * or S E * phase.
Claim 4
Dependent Claim
56 words
The switching or indicating component as claimed in claim 1 selected from the group consisting of (a) elliptical polarizers (b) light modulators in "birefringence mode" (c) light modulators in "guest-host mode" (d) pulse chopper (e) gray scales for display screens and printers (f) electrically controlled matrices for non-linear optical materials and (g) sensors for electric fields.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |