Methods for laminating films for spd light valves and spd light valves incorporating such laminated films
CA 2563303 C · Owner: Research Frontiers Incorporated · Inventors: Chakrapani, Srinivasan; Saxe, Robert L.; Slovak, Steven M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is directed to a method for laminating a suspended particle device (SPD) film which comprises forming a suspended particle device film; positioning the suspended particle device film within an unlaminated stack of components for forming a laminated suspended particle device film wherein the , stack comprises at least one hot melt adhesive sheet or film contacting an outer surface of the suspended particle device film; subjecting the unlaminated stack to at least a partial vacuum preheating the unlaminated , stack of components under the vacuum for a time and at a temperature selected to permit at least partial degassing of the stack and applying a sufficient net …
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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
- Filed July 23, 2004 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2026.
- 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.