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Expired Canadian patentCanada

Radiation-hardenable diluents

CA 1180720 A · Owner: Diamond Shamrock Chemicals Company · Inventors: Sinka, Joseph V.; Higbie, Francis A.; Lieberman, Robert A.

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Abstract From the Canadian patent

Radiation curable diluents have been developed which are acrylic acid esters of alkoxylated 1,6-hexanediol neopentyl glycol, and tripropylene glycol each having a relatively low degree of alkoxylation. Examples are diacrylates of adducts of neopentyl glycol with two moles, four moles and six moles respectively, of, ethylene oxide and with two moles and four moles respectively, of, propylene oxide.

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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 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 10, 1982
GrantedJanuary 8, 1985
Term endedJanuary 8, 2002
Patent numberCA 1180720 A
Classification (IPC)C08K5/10 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMarch 10, 1982Patent grantedJan 8, 1985Term endedJan 8, 2002

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