Tar gel formulation
CA 1069046 A · Owner: Bristol-Myers Squibb Company · Inventors: Hebborn, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tar formulation used in the treatment of skin disorders. The composition is an aqueous gell comprising from about 1 to about 10% by weight of an organic solvent extract of crude coal tar: from about 25% to about 65% by weight of propylene glycol; from about 20% to 35% by weight of ethyl alcohol; from about 0.5% to about 5% by weight of a gelling agent; and from about 5% to 35% water; said gelling agent being a neutralized carboxylated interpolymer of a monomeric monoolefinic acrylic acid of the structure CH2 = C-?OOH, where R is a substituent selected from the class consisting of hydrogen and lower alkyl groups, and from about 0.1 to about 10% by weight based on the total monomers of a …
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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
- Granted January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 1997.
- 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.