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Expired Canadian patentCanada

Contrasting gloss surface coverings and surface coverings optionally containing dispersed wear-resistant particles and methods of making the same

CA 2283835 C · Owner: Judd, Richard · Inventors: Shultz, Jeffrey R.; Judd, Richard; Rufus, Isaac B.

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Abstract From the Canadian patent

A surface covering comprising at least one layer containing wear-resistant particles, such as aluminum oxide, is disclosed. Preferably the wear-, resistant particles are present in the outermost layer of the surface covering which is exposed to the environment. A method to improve wear and/or stain resistance to a surface covering is also disclosed and includes adding an effective amount of wear-resistant particles to a top coat layer or outermost layer of a surface covering optionally with the use of a suspension aid. , Also layers of surface coverings having differences in gloss levels are also disclosed. Methods of making the surface coverings are also disclosed.

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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

  • Filed January 27, 1999 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 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.
FiledJanuary 27, 1999
GrantedMarch 18, 2003
Term endedJanuary 27, 2019
Patent numberCA 2283835 C
Classification (IPC)D06N7/00 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedJan 27, 1999Patent grantedMarch 18, 2003Term endedJan 27, 2019

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.