Combination for improved delivery of tobacco modifying agents
CA 2092176 C · Owner: Eastman Chemical Company · Inventors: Mathis, Dale Edwin; Harris, James Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are articles, such as smoke, filters which contain fibers that have complex geometry in combination with tobacco modifying agents such as flavorants. The fibers are preferably made of polyester such as poly(ethylene terephthalate) and preferably are capable of spontaneously transporting water or ndecane on their surfaces. The articles of the invention result in improved delivery of the tobacco modifying agent to the user.
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 30, 1991 and granted April 8, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2013.
- 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.