Water-soluble glass to protect glassware from corrosion in a dishwashing machine
CA 2355367 C · Owner: Reckitt Benckiser N.V. · Inventors: Hahn, Karlheinz Ulrich Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of a water-soluble glass as corrosion protection for glassware. According to the invention the water-soluble glass consists of at least one compound which in cleaning and/or rinsing cycles of a dishwashing machine releases an agent which protects glassware against corrosion. Each of these compounds accounts for no more than 85 molar % of the glass and the solubility of the water-soluble glass is defined by a mass loss of at least 0.5 mg under the conditions specified in DIN ISO 719.
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
- Filed December 29, 1999 and granted March 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2021.
- 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.