Sulfone-containing hindered amines
CA 1291998 C · Owner: Reilly, James L. · Inventors: Reilly, James L.; Huber, Ludwig K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds having the formula I , II , where R1, R2, R3, R4, and R5 are independently selected from hydrocarbons, n is an integer of 1 to 15 and Y is H, OH, O, or, OR where R is a hydrocarbon are useful as stabilizers for polymers against the detrimental effects produced by exposure to actinic radiation, such as visible or ultraviolet light rays.
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
- Granted November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.