Nova Patents
US2256993A

Heat exchange structure

Abstract

This record has no abstract on file.

Term

Term ended

Expired 23 September 1958, 68 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

Every citation, both ways

Citations
DocumentRelationOfficeCited during
EP0534170A1Cited byEuropean Patent Office (EPO)Search report
DE3136865A1Cited byGermanySearch report
US2862693ACited byUnited States of AmericaSearch report
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DE967768CCited byGermanySearch report
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US4749031ACited byUnited States of AmericaSearch report
US4552292ACited byUnited States of AmericaSearch report
US5121791ACited byUnited States of AmericaSearch report
EP0639751A2Cited byEuropean Patent Office (EPO)Search report
US4834173ACited byUnited States of AmericaSearch report
DE958296CCited byGermanySearch report
RU188403U1Cited byRussian FederationSearch report