Alignment of ferroelectric lcds
CA 1237508 A · Owner: American Telephone And Telegraph Company · Inventors: Goodby, John W.; Leslie, Thomas M.; Patel, Jayantilal S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
19 -, ALIGNMENT OF FERROELECTRIC LCDs Abstract, The alignment of liquid crystal materials in cells utilized for devices is significantly enhanced through the use of materials such as polyamides, polyimides and, polyesters. This expedient for alignment of liquid crystal materials is useful for nematic and cholesteric liquid crystals, but finds particularly advantageous use for aligning smectic liquid crystals.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.