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Expired Canadian patentCanada

Cesium beam tube

CA 1068013 A · Owner: Frequency And Time Systems · Inventors: Kern, Robert H.

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

The molecular beam tube apparatus includes a source for providing a directed beam of molecular particles a first state selector for selecting a portion of the particles in the beam a radio frequency transition section, downstream from the first state selector for causing resonance transitions of some of the selected beam particles means for producing a weak generally homogeneous magnetic field in the radio frequency transition section a, second state selector downstream from the radio frequency transition section for selecting a further portion of the beam comprising those beam particles that have undergone a resonance transition and detecting means responsive to said particles in 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 December 11, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 11, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 11, 1979
Term endedDecember 11, 1996
Patent numberCA 1068013 A
Classification (IPC)G21K1/00 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedDec 11, 1979Term endedDec 11, 1996

Sources & verification

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