Infusion coffee filter pack
CA 2025875 A1 · Owner: Macfeiggan, Pamela J. · Inventors: Macfeiggan, Pamela J.; Rehman, Warren C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved and optimized design for a universal infusion coffee filter pack designed to fit and provide for consistent brewing of quality coffee in a variety of American style and European style coffeemakers. The infusion coffee pack comprises a first circular piece of filter paper, having its surface area stretched and increased by at least 3% to form a rounded pocket, and sealed to a second circular piece of filter paper to a form a substantially one half inch sealed flange therearound. A metered quantity of coffee grounds is sealed within the rounded pocket and is, provided with a head space of substantially fifty percent or greater of the volume within the rounded coffee pocket. The …
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 September 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 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.