High light diffusive and low light absorbent material and method for making and using same
CA 2236804 C · Owner: Minor, Raymond B. · Inventors: Minor, Raymond B.; Mcgregor, Gordon L.; Hannon, Gregory E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is an improved material and method for use for providing diffuse transflectance of light. By employing an expanded polytetrafluoroethylene (PTFE) comprising a microstructure of polymeric nodes and fibrils, the material of the present invention demonstrates exceptional diffuse reflectivity and transmission of light across a wide spectrum of ultraviolet, visible, and infrared light. Additionally the material of the , present invention provides many properties that have been previously unavailable in highly diffuse transflective material including a high degree , of malleability moldability and flexibility, and effective reflectivity even at relatively thin cross …
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 September 23, 1996 and granted July 31, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2018.
- 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.