Delaying the gelation of water soluble polymers
CA 1315909 C · Owner: Mumallah, Naim A. · Inventors: Moradi-Araghi, Ahmad; Mumallah, Naim A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
32344CA, Abstract of the Disclosure, A process is disclosed for delaying the rate at which water soluble polymers are gelled by an aldehyde and a phenolic compound and for increasing the mechanical strength of these gels which comprises contacting an aqueous solution of said water soluble polymer aldehyde, phenolic compound, and water with from .004 to about 0.049 wt % of a transition metal ion. In addition, novel gelable compositions are disclosed.
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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.