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Expired Canadian patentCanada

Lower density silicone elastomeric foam

CA 1270096 C · Owner: Dow Corning Corporation (The) · Inventors: Bauman, Therese M.

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

This invention discloses a method of controlling the relative physical properties of foams such as density and compressibility or density and Bashore resiliency for compositions which consist essentially of triorganosiloxy endblocked polydiorganosiloxane having at least two vinyl radicals, platinum catalyst, organohydrogensiloxane and, hydroxyl endblocked polydiorganosiloxane. The relative values of the physical properties are adjusted by the addition of varying amounts of organic alcohol having from 3 to 12 carbon atoms to the composition.

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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 18, 1986
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1270096 C
Classification (IPC)C08L83/04 +2 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedAug 18, 1986Patent grantedJune 5, 1990Term endedJune 5, 2007

Sources & verification

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