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Electric hygrometer

  • US 2,728,831 A
  • Filed: 11/09/1951
  • Issued: 12/27/1955
  • Est. Priority Date: 11/09/1951
  • Status: Expired due to Term
First Claim
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1. A HUMIDITY SENSITIVE ELEMENT COMPRISING A BODY MEMBER FORMED OF A SOLID, ELECTRICALLY INSULATING CROSSLINKED ORGANIC POLYMER, SAID BODY MEMBER HAVING AN ION EXCHANGE MATERIAL ONLY IN A THIN LAYER AT THE SURFACE OF

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