Method and device for manufacturing biodegradable molded objects
CA 2245592 C · Owner: Ando, Sadamasa · Inventors: Ozasa, Akio; Ando, Sadamasa; Haruta, Toshitaka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A molding raw material (9) is heated and swollen by applying a voltage from a power source portion (2) having an A.C. power source for induction heating to a power feed plate (29) and applying an electric field to a power receiving plate (28), which is out of contact with the power feed plate (29) in a , direction crossing the moving direction of a mold (8). This design can prevent the mold from coming into contact with an electrode and generating arc discharge during heat-molding of a biodegradable molded article by induction heating.
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 December 12, 1997 and granted March 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2019.
- 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.