Shaped articles and photographic element supports made from orientable polymers and polymer microbeads
CA 2030752 C · Owner: Smith, Glen C. · Inventors: Priebe, Elizabeth K.; Maier, Larry K.; Smith, Glen C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are shaped articles and photographic elements having reflective or diffusely transmissive supports shaped from a continuous oriented polymer phase having, dispersed therein microbeads of a polymer which are at least partially bordered by void, space, the microbeads being present in an amount of about 5-50% by weight based on the, weight of the oriented polymer and the void space occupying about 2-60% by volume of, the support. Preferably, the microbeads are cross-linked to an extent they will be resilient, and elastic at the orientation temperature and are coated with a slip agent. , Such shaped articles and supports have excellent physical properties.
Read the whole patent
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 November 23, 1990 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 2012.
- 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.