Wide-angle-reflective cube-corner retroreflective sheeting
CA 1292903 C · Owner: Minnesota Mining And Manufacturing Company · Inventors: Benson, Gerald M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Cube-corner retroreflector capable of reflecting light over a wide range of incidence angles. The reflector, which in some embodiments may be in the form of flexible sheeting, comprises 1) a transparent body configured on its rear surface with at least one set of three mutually perpendicular surfaces providing cube-corner retroreflection of light beamed against the front of the body, and 2) a specularly reflective surface which is shaped as a negative of the aforementioned set of three mutually perpendicular surfaces and which is interfitted iwth a closely spaced from that set of rear surfaces with, the adjacent and matching portions of the specularly reflective and rear surfaces …
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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
- Granted December 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
- 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.