Syrup composition
CA 2035693 C · Owner: Suzuki, Yukio · Inventors: Kawasaki, Yoshihiko; Suzuki, Yukio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a syrup composition characterized in that the composition contains phenobarbital or acetaminophen, a polyhydric alcohol and/or a polymer of a polyhydric alcohol, and a water soluble macromolecule and the weight ratio of, phenobarbital to the polyhydric alcohol and/or the polymer of the polyhydric alcohol is from 1:20 to 1:100 and the weight ratio of, phenobarbital to the water soluble macromolecule is from 1:1 to 1:20 which has a reduced bitterness and is easy to take.
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 February 5, 1991 and granted February 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2013.
- 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.