Method of electroforming articles using a photomask mandrel
CA 1269342 C · Owner: Ppg Industries Ohio, Inc. · Inventors: Postupack, Dennis Sylvester; Pressau, Jean Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for making a metallic article by electroforming, in which a mandrel is first prepared by depositing a first continuous layer of a conductive film on a non-conducting substrate and a second continuous layer of photoresist on the conductive film. The photoresist is exposed through a photomask, and developed to produce a pattern on the conductive film corresponding to the configuration of the article to be electroformed. The conductive film is then made the cathode in an electroforming solution with an anode comprising a metal to be deposited, and an electric current is passed until the desired thickness of metal to form the metallic article has been deposited on the mandrel. The …
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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
- Granted May 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
- 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.