Method and apparatus for producing shade material
CA 2183670 C · Owner: Teh Yor Co. Ltd. · Inventors: Huang, Chung-Chen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for producing an expandable material from a strip material by longitudinally reciprocating a carriage on a frame between first and second rolls containing supplies of the strip material. The carriage is alternately engageable with the strip material of the first supply roll and the strip material of the second supply roll. The carriage includes an adhesive application device that applies an adhesive to a top surface of a stack of sheets of strip material positioned between the first and second supply rolls using the adhesive application device by moving the carriage. The strip material is then pressed and stacked by a press and stacking device that are driven by cams.
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 August 19, 1996 and granted March 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2018.
- 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.