Process for the antimicrobial finishing of paper
CA 1052689 A · Owner: Bayer Aktiengesellschaft · Inventors: Paulus, Wilfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Paper is provided with an antimicrobial finish by applying a microbicidally active phenol derivative having the formula, wherein, R1, R2, R3 R4, and R5 which may be the same or different. are selected from the group of hydrogen, halogen and lower alkyl, in addition to which R1 may also represent, wherein, R2, R3, R4' and R5 which may be the same or different, are selected from the group of hydrogen, halogen and lower alkyl, and R3 may also represent the carboxyl group (-COOH) and, R5 may also represent phenyl to an aqueous pulp suspension, said phenol derivative being added to said suspension in the form of a phenolate salt thereof with quaternary ammonium ions in an organic solvent.
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 April 17, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 1996.
- 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.