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Expired Canadian patentCanada

Semiconductor ram cells having superimposed capacitors

CA 1096499 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Salters, Roelof H. W.

CIPO record

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

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Abstract From the Canadian patent

PHN 8299, 16.10.1976, ABSTRACT:, In a 1 MOS/bit memory a high packing density is obtained by shifting the capacitors of adjacent columns one into the other in such manner that two capacitors belonging to different columns are formed by three conductive layers which are situated one above the other the central, layer can be connected to reference potential the, uppermost layer is connected to the MOST in the column and the lowermost layer is connected to a MOST in the other column. -34-

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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 February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 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.
FiledFebruary 2, 1977
GrantedFebruary 24, 1981
Term endedFebruary 24, 1998
Patent numberCA 1096499 A
Classification (IPC)G11C11/08 +2 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedFeb 2, 1977Patent grantedFeb 24, 1981Term endedFeb 24, 1998

Sources & verification

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