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Expired Canadian patentCanada

Gels, gel products and methods

CA 1284397 C · Owner: Corning Glass Works · Inventors: Rittler, Hermann Lorenz

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

There are disclosed gels composed of hydrated phyllosilicates combined with a lattice expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine. Both organic and inorganic additions as well as ion, exchange products, are disclosed. The gels with or, without the additions, may be polymerized and may be formed or shaped. Also disclosed are methods for generating the gels and for treating the gels generated.

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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 May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 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.
FiledJune 9, 1986
GrantedMay 21, 1991
Term endedMay 21, 2008
Patent numberCA 1284397 C
Classification (IPC)C01B33/20 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedJune 9, 1986Patent grantedMay 21, 1991Term endedMay 21, 2008

Sources & verification

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