Process of preparing a tea product
CA 2013864 C · Owner: Bel, Willem Jacobus · Inventors: Barmentlo, Bart; Pendlington, Sidney; Bel, Willem Jacobus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process of preparing a tea extract the extract is, adjusted to 20-80°C, treated with tannase at pH= 4-7 and then subjected to ultrafiltration at 2-90°C using a membrane with an average molecular weight exclusion point of at least 5000 Daltons (preferably at least 30,000 Daltons). The extract may finally be subjected to an additional filtration, preferably microfiltration. Also an instant a cold-water soluble tea powder or granulate is claimed.
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 April 4, 1990 and granted November 12, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2012.
- 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.