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Expired Canadian patentCanada

Formed organosiloxane-amine copolycondensates, process of producing same and their use (ii)

CA 2022385 C · Owner: Panster, Peter · Inventors: Wieland, Stefan; Panster, Peter

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Abstract From the Canadian patent

The present invention relates to organosiloxane-amine copolycondensates crosslinked, when required by means of, Si-,Ti-,Zr-and/or Al-containing crosslinking agents and comprising units, (see fig.I) and X - R4 wherein R1 - R4 = R5 - (see fig.II), wherein R5 represents alkylene directly linked to N and R respectively and containing C1 - C10, cycloalkylene with C5 - C10 or, (see fig.III) and (see fig,IV) X = -NH2, -NH-(CH2)2-NH2. -N(CH3)2, -N(C2H5)2 -NH-(CH2)2-NH-(CH2)2-NH2, -Cl, -Br, -J -SH, -P(C6H5)2, (see fig.V), (see fig.VI) (see fig.VII), (see fig.VIII), (see fig.IX) wherein R" represents H or alkyl with C1 - C5 in the form, of globular particles having a diameter of 0.1 to 3mm a, …

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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

  • Filed July 31, 1990 and granted October 14, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 31, 1990
GrantedOctober 14, 1997
Term endedJuly 31, 2010
Patent numberCA 2022385 C
Classification (IPC)C08G77/22 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedJuly 31, 1990Patent grantedOct 14, 1997Term endedJuly 31, 2010

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