Method of controlling release of bitterness inhibitors in chewing gum and gum produced thereby
CA 2273034 C · Owner: Witkewitz, David L. · Inventors: Witkewitz, David L.; Tyrpin, Henry T.; Wolf, Fred R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producting a chewing gum with a controlled release of a bitterness inhibitor, as well as the chewing gum so produced is obtained by physically modifying the release properties of the bitterness inhibitor by coating and drying. The bitterness inhibitor is coated by encapsulation, partially coated by agglomeration entrapped by absorption, or treated by multiple steps of encapsulation agglomeration, and absorption. The coated bitterness inhibitor is preferably then co-dried and particle sized to produce release-modified bitterness inhibitor for use in chewing gum. When incorporated into the chewing gum these , particles are adapted to produce a fast release or a delayed release …
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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
- Filed December 23, 1996 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 2018.
- 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.