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Expired Canadian patentCanada

Diphenyliodonium hexafluoro metal salts

CA 1283425 C · Owner: General Electric Company · Inventors: Crivello, James Vincent

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Abstract From the Canadian patent

Cationic polymerization of a variety of organic materials such as vinyl monomers, prepolymers cyclic, ethers, cyclic esters and organosilicon cyclics can be achieved by the use of certain radiation sensitive aromatic halonium salts. In addition, polymerizable compositions are provided which can be used as coating compounds, molding resins, adhesives etc. The salts have the general formula, (R1) I + MF6 -, where M is an element selected from the class consisting of P, As and Sb, R1 is a divalent aromatic organic radical selected from, and , where n is an integer.

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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 April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 2, 1975
GrantedApril 23, 1991
Term endedApril 23, 2008
Patent numberCA 1283425 C
Classification (IPC)C07F9/54 +2 more

Timeline

Timeline From CIPO dates

197619801984198819921996200020042008Application filedMay 2, 1975Patent grantedApril 23, 1991Term endedApril 23, 2008

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.