Indan derivatives
CA 2002014 C · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Kitahara, Takumi; Yokoyama, Keiichi; Hashimoto, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Discloses indan derivatives represented by the general formula (I):, (I), wherein R is a lower alkoxy group a phenoxy group, , whereupon R1 and R2 are respectively, a hydrogen atom, a, lower alkyl lower alkenyl, phenyl, or phenyl group substituted by halogen atoms, or R1 and R2 together with the nitrogen atom to which they are bonded form a monopholino group. The indan derivatives demonstrated satisfactory results in respect of a weeding effect and safety in practical use.
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 November 1, 1989 and granted February 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 2011.
- 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.