Patent US3785446A successfully refreshed from Google Patents.
US4428873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrooptical element
Assignee: Kureha Corp
•
Filing: 1981-08-27
•
Granted: 1984-01-31
•
Expires: 2001-08-27
Abstract
Abstract An electrooptical solid element comprises a formed resin composition comprising a low molecular polar substance having a Kerr type electrooptical effect, and an organic polymer substance compatible with the low molecular polar substance. The formed resin composition is prepared by a method such as melt mixing on rollers, or dissolution in a common solvent followed by evaporation of the solvent. This formed resin composition is prepared in various shapes such as a polygon, a film, a prism and a polygonal pole. At least a pair of electrodes are provided on the surfaces of the formed resin composition, and further at least one of the electrodes may can be made of a transparent material.
Inventors
- 👤 Naohiro Murayama
- 👤 Teruo Sakagami
- 👤 Masuhiro Shoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:11
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/0009; G02F1/35; G02F1/355; G02F1/361; G02F1/3615
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
An electrooptical element exhibiting the Kerr effect which comprises a transparent solid member formed of a resin composition and at least a pair of electrodes on its surfaces, said resin composition comprising a low molecular weight polar substance having a Kerr type electrooptical effect and an organic polymer substance selected from the group consisting of polymethacrylates, polystyrene, polysulfone, polyvinylchloride, polycarbonate, BS resin, ABS resin and MBS resin.
Claim 2
Dependent Claim
67 words
An electrooptical element exhibiting the Kerr effect which comprises a transparent solid member formed of a resin composition and at least a pair of electrodes on its surfaces, said resin composition comprising a low molecular weight polar substance having a Kerr type electrooptical effect and an organic polymer substance selected from the group consisting of polymethacrylates, polystyrene, polysulfone, polyvinylchloride, polycarbonate, BS resin, ABS resin and MBS resin.
Claim 3
Dependent Claim
20 words
The electrooptical element as claimed in claim 1, wherein said low molecular weight polar substance is a nitro aromatic compound.
Claim 4
Dependent Claim
18 words
The electrooptical element as claimed in claim 2 wherein said nitro aromatic compound has an electron donative group.
Claim 5
Dependent Claim
15 words
The electrooptical element as claimed in claim 1 wherein said organic polymer substance is transparent.
Claim 6
Dependent Claim
24 words
The electrooptical element as claimed in claim 1 wherein said organic polymer substance is plasticized and made transparent by said low molecular polar substance.
References Cited (Backward Citations)
US3167607A
Cited
US3257903A
Cited
GB1331228A
Cited
US3642347A
Cited
US4234437A
Cited
DE2214328C3
Cited
US4058477A
Cited
US3955015A
Cited
US3941453A
Cited
US4231641A
Cited
US4072411A
Cited
US4283114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |