Process for preparing organic phosphorus compounds
CA 1104581 A · Owner: Mitsui Toatsu Chemicals, Inc. · Inventors: Yamamoto, Isamu; Noda, Eiichi; Noguchi, Yoshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a process for preparing organic phosphorus compounds, the process including the steps of: reacting (a) a cyclic halogenophosphite expressed by the general formula (I) (I), (in which Z is -CH2- or -CH2CH2- and R2 represents a hydrogen atom a methyl, group or an ethyl group when Z is -CH2- and R2 represents hydrogen or a methyl group when Z is -CH2CH2-, and X1 represents a halogen atom) with (b) a cyclic, phosphorous acid ester expressed by the general formula II (II), (in which R1 and Y have the same meanings respectively as are given for R2, and Z above and RB represents an alkyl group containing 1 - 4 carbon atoms or a halogenated alkyl group containing 2 - 4 carbon …
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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 July 7, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 1998.
- 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
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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.