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Expired Canadian patentCanada

Compact, two-phase charge-coupled-device structure utilizing multiple layers of conductive material

CA 1111137 A · Owner: Fairchild Camera And Instrument Corporation · Inventors: Walsh, Lloyd R.

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Abstract From the Canadian patent

APPLICATION FOR PATENT, -of-, LLOYD R. WALSH -for-, A COMPACT, TWO-PHASE CHARGE-COUPLED-DEVICE STRUCTURE UTILIZING MULTIPLE LAYERS OF CONDUCTIVE MATERIAL ABSTRACT OF THE DISCLOSURE, An improved charge-coupled-device gate structure utilizes three depositions of electrically conductive material to form electrodes, thereby allowing fabrication of two-phase CCD gate structures occupying less wafer surface area and operating at faster speeds than conventional charge-coupled-device gate structures. -1-

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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 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 4, 1977
GrantedOctober 20, 1981
Term endedOctober 20, 1998
Patent numberCA 1111137 A
Classification (IPC)G11C11/08 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedJuly 4, 1977Patent grantedOct 20, 1981Term endedOct 20, 1998

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