Antistatic sheet material, package and method of making
CA 2004137 C · Owner: Mott, Charles L. · Inventors: Babinec, Michael A.; Burdeaux, David C.; Mott, Charles L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antistatic sheet material and package formed therefrom is provided. The laminated sheet material includes a first inner layer which is preferably a coextruded film having a polyolefin ply and second copolymer ply of ethylene-acrylic acid copolymer ethylene vinyl acetate copolymer, or blends thereof a, second intermediate layer such as a polyester film having an electrically conductive material thereon and, an outer layer of an antistatic material. The laminate may be formed by hot roll lamination or an adhesive may be used between the first and second layers.
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 29, 1989 and granted October 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2011.
- 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.