Patent Yard Sign in
Expired Canadian patentCanada

Benzene-insoluble organoaluminum oxy-compounds and process for preparingsame

CA 1339141 C · Owner: Tsutsui, Toshiyuki · Inventors: Tsutsui, Toshiyuki; Toyota, Akinori; Kioka, Mamoru

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

In accordance with the present invention there are, provided benzene-insoluble organoaluminum oxy-compounds having less than 10% in terms of Al atom of Al component dissolving in benzene kept at 60°C and less than 0.09 of a (D1260/D1220) of an absorbance (D1260) at 1260 cm-1 to an absorbance (D1220) at 1220 cm-1, both obtained by infrared spectrophotometry, and also processes for preparing said benzene-insoluble organoaluminum oxy-compounds.

Read the whole patent

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 July 29, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 29, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 13, 1989
GrantedJuly 29, 1997
Term endedJuly 29, 2014
Patent numberCA 1339141 C
Classification (IPC)C07F5/06 +1 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedSep 13, 1989Patent grantedJuly 29, 1997Term endedJuly 29, 2014

Sources & verification

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