Radiation protection material based on silicone

Radiant energy – Radiation controlling means – Shields

Reexamination Certificate

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C250S515100, C524S408000

Reexamination Certificate

active

07432519

ABSTRACT:
The invention relates to a lead substitute material for radiation protection purposes, wherein the lead substitute material comprises from 12 to 22 wt. % silicone-based matrix material, from 1 to 75 wt. % Sn or Sn compounds, from 0 to 73 wt. % W or W compounds, from 0 to 80 wt. % Bi or Bi compounds, for nominal overall lead equivalents of from 0.25 to 2.00 mm. The invention relates further to a lead substitute material that additionally comprises one or more of the elements Er, Ho, Dy, Tb, Gd, Eu, Sm, Ta, Hf, Lu, Yb, Tm, Th, U and/or their compounds and/or CsI.

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patent: 6153666 (2000-11-01), Lagace
patent: 6548570 (2003-04-01), Lange
patent: 6674087 (2004-01-01), Cadwalader et al.
patent: 7041995 (2006-05-01), Eder
patent: 2002/0179860 (2002-12-01), Smith
patent: 2007/0152197 (2007-07-01), Lagace et al.
patent: 199 55 192 (1999-11-01), None
patent: 201 00 267 (2001-01-01), None
patent: 0 371 699 (1989-11-01), None
patent: 2 741 472 (1977-05-01), None
patent: WO 2004/017332 (2004-02-01), None

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