Free-call certificate service system
CA 2507064 A1 · Owner: Lee, So-Young · Inventors: Park, Jong-Do; Lee, So-Young; Bae, Sang-Hyu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a free-call certificate service system. The free-call certificate service system is capable of returning a portion of the price for online/offline product purchase or fee for online/offline service use to a customer in the form of a free-call certificate which allows the customer to , conduct a telephone conversation free of charge up to a predetermined amout of money or for a predetermined period of time as a reward for the product , purchase or service use so as to reduce the customer~s burden of communication cost and thus enable the customer to enjoy a more tangible reward service.
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 November 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 2025.
- 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.