Hydroxy-aluminum/lignin sulfonate compositions
CA 1188498 A · Owner: Chevron Research And Technology Company · Inventors: Ferm, Richard L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HYDROXY-ALUMINUM/LIGNIN SULFONATE COMPOSITIONS" A composition comprising salts of lignin sulfonate and hydroxy-aluminum and water. The composition stabilizes soil formations from the effects of water and increases the water resistance of paper products.
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 June 11, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2002.
- 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.