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Expired Canadian patentCanada

One piece frame for holding a holographic element in a holographic system

CA 1315575 C · Owner: Grumman Aerospace Corporation · Inventors: Jue, Suey L.; Leib, Kenneth G.

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

A one piece frame for holding a holographic element in a holographic system, and comprising a border portion, a seating portion, and a plurality of lateral positioning tabs. The border portion forms an outside border of the frame, and is flexible between an open position for receiving the holographic element and a closed position for holding the holographic element in the frame. The seating portion is connected to and extends inward from the border portion to seat against a back surface of the holographic element. The lateral positioning tabs are connected to and extend inward from the border portion, above the seating portion and are, spaced apart from each other along the border portion …

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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 April 6, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 6, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 2, 1987
GrantedApril 6, 1993
Term endedApril 6, 2010
Patent numberCA 1315575 C
Classification (IPC)G03H1/04 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 2, 1987Patent grantedApril 6, 1993Term endedApril 6, 2010

Sources & verification

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