Roof sign
CA 2012672 C · Owner: Trame, Charles E. · Inventors: Trame, Charles E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An illuminated sign is comprised of single piece molded plastic front, intermediate and rear frame members which are substantially coextensive with the width of the sign. All of the characters are formed on the intermediate frame member and they fit into a front frame which serves not only as a support but as a means for masking those parts of the intermediate frame which connect between characters for ex-, ample, and which should not be illuminated. The sign is hingedly mounted to a fixed support member which in turn, supports fluorescent tubes which run along the length of the sign for illuminating the characters to make them visible at night as well as during the daytime. The sign swings …
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 March 21, 1990 and granted June 7, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.