Antidandruff compositions
CA 1183779 A · Owner: Beecham Group P.L.C. · Inventors: Graham, June; Davis, Walter B.; Fairhurst, Edgar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Zinc pyridine thione in particulate form wherein a major proportion of the particles each have a maximum diameter of 2µm, and a maximum volume of 3 x 10-17m3 and a minimum surface area of 2m2/g and are in the form of hexagonal flat platelets or fragments thereof is, particularly efficacious in treating superficial disorders including dandruff and may be formulated in conventional presentations.
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 March 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2002.
- 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.