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METHOD OF MAKING AN INORGANIC RETICULATED FOAM STRUCTURE

  • US 3,616,841 A
  • Filed: 10/30/1967
  • Issued: 11/02/1971
  • Est. Priority Date: 10/30/1967
  • Status: Expired due to Term
First Claim
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2. A method as set forth in claim 1 in which a pressure differential is created on different portions of said investment during the introduction of the molten substance therein, with said substance being introduced on the portion of greatest pressure.

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