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Expired Canadian patentCanada

Sanitary sheets made of waste paper and a process of preparing sanitary sheet from waste paper

CA 2629247 C · Owner: Agarwal, Sanjiv · Inventors: Agarwal, Sanjiv

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention relates to an improved smudge free sanitary sheet made of waste paper , and a process of preparing the same through processing the surplus newsprint and more , precisely processing used/recycled paper. The sanitary sheets are prepared by the process , steps of collecting pre-consumer overprint or post consumer read newspapers; grading , the collected waste newspaper; drying and sterilizing the graded newspaper by applying , ultraviolet, infrared and/or gamma rays; trimming and cutting the dried sterilized sheets , in appropriate sizes; applying on at least one of the sides of the waste newspaper an , aqueous coating comprising of a mixture of resin such as bleached …

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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 November 28, 2005 and granted March 20, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 28, 2005
GrantedMarch 20, 2012
Term endedNovember 28, 2025
Patent numberCA 2629247 C
Classification (IPC)D21H19/00

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedNov 28, 2005Patent grantedMarch 20, 2012Term endedNov 28, 2025

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