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Expired Canadian patentCanada

Non-combustible x-ray and nuclear radiation shields with high hydrogen content

CA 1102102 A · Owner: Chemtree Corporation · Inventors: Hall, William C.; Peterson, John M.

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

This invention relates to compositions methods of, production and uses of non-combustible nuclear radiation shields with particular emphasis on those containing a high concentration of hydrogen atoms, especially effective for moderating neutron energy by elastic scatter, dispersed as a discontinuous phase in a continuous phase of a fire resistant matrix.

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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 June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 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.
FiledOctober 27, 1978
GrantedJune 2, 1981
Term endedJune 2, 1998
Patent numberCA 1102102 A
Classification (IPC)C09K3/00

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedOct 27, 1978Patent grantedJune 2, 1981Term endedJune 2, 1998

Sources & verification

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