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Expired Canadian patentCanada

Process for making a curved, conductively coated glass member and the product thereof

CA 1212874 A · Owner: Donnelly Mirrors, Inc. · Inventors: Bitter, Lowell E.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The specification discloses a method for making a curved, conductively coated glass member and the resulting, product, by providing for a sufficient degree of substoichiometry at the moment of bend that the glass can be bent using conventional bending techniques without crazing the coating. Two alternative methods for achieving the degree of substoichiometry are disclosed. One involves coating the part to an initial light transmittance (T0) which is lower than that typically sought by prior artisans. The other involves bending the part in a reducing environment. Also disclosed is a method for increasing conductivity of the coating by exposing the coated part to a reducing environment at …

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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 October 21, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 21, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 27, 1983
GrantedOctober 21, 1986
Term endedOctober 21, 2003
Patent numberCA 1212874 A
Classification (IPC)C03C21/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedOct 27, 1983Patent grantedOct 21, 1986Term endedOct 21, 2003

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.