Neutral density polymeric material for lighting fixture
CA 2313546 C · Owner: Lexalite International Corporation · Inventors: Barnes, Thomas F. Ii; Troppman, Dale A.; Robinson, Joel E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A luminaire having both a direct and indirect lighting component is provided. The luminaire includes a fixture including a lamp (16). A neutral density polymeric material (12) is disposed below the lamp (16). The neutral density polymeric material (12) includes a polymeric substrate (28) carrying a predetermined pattern for reflecting and transmitting incident light from the lamp (16).
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 January 22, 1999 and granted August 12, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2021.
- 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.