Expired Canadian patentCanada
Paper manufacturing using agglomerated hollow particle latex
CA 2577549 C · Owner: Omnova Solutions Inc. · Inventors: Tsavalas, John; Roper, John A. Iii; Galloway, James G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Agglomerated hollow particle latex is employed as a filler in the wet end of the paper-making process to provide paper with improved properties.
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 August 24, 2005 and granted February 21, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 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.
FiledAugust 24, 2005
GrantedFebruary 21, 2017
Term endedAugust 24, 2025
Patent numberCA 2577549 C
Classification (IPC)D21H21/54
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.