Patent Yard Sign in
Expired Canadian patentCanada

Synthetic alkali metal alumino-silicates, compositions and their methods of preparation

CA 1293239 C · Owner: Wason, Satish K. · Inventors: Wason, Satish K.

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

A family of novel and unique synthetic alkali metal aluminosilicates (SAMS) are produced by the hydrothermal reaction between kaolin clay and alkali metal silicates. The integrated composition of the SAMS products is a unique entity having an overall composition of xM2O:A12O3:ySiO2:ZH2O, where x is the number of moles of alkali metal oxide and is from 0.01 to 2.0, M is an alkali metal y is the number of, moles of SiO2 in the unique SAMS composition and z is the, number of moles of bound water and is in the range of from 1.0 to 5Ø The composition essentially comprises altered kaolin clay platelets with an integral rim or protuberance of essentially amorphous alkali metal silicate-kaolin …

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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 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 16, 1987
GrantedDecember 17, 1991
Term endedDecember 17, 2008
Patent numberCA 1293239 C
Classification (IPC)B01J29/06 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJune 16, 1987Patent grantedDec 17, 1991Term endedDec 17, 2008

Sources & verification

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