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Expired Canadian patentCanada

Detergent composition and its use in a dishwashing machine

CA 1092476 A · Owner: Chemed Corporation · Inventors: Daugherty, Denny E.; Sabatelli, Philip M.

CIPO record

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Abstract From the Canadian patent

The invention disclosed provides a new improved detergent composition and a method of using same. The detergent is formulated as a slurry. It contains an alkaline builder e.g. an alkali metal hydroxide and/or silicate a water-soluble poly-, electrolyte polymer e.g. sodium polyacrylate, and a water, conditioner e.g. sodium tripolyphosphate. This slurry composition is found to have significant advantages over both liquid detergents and powder detergents in dispensing as well as in use.

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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 December 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 21, 1977
GrantedDecember 30, 1980
Term endedDecember 30, 1997
Patent numberCA 1092476 A
Classification (IPC)C11D3/06 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedFeb 21, 1977Patent grantedDec 30, 1980Term endedDec 30, 1997

Sources & verification

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