KURTZ, ROBERT J.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4453937 Drainage device with flow meterExpiredAug 05, 81Jun 12, 84[A61M]
4445884 Air purge unit for auto transfusion apparatusExpiredAug 14, 81May 01, 84[A61M]
4425922 Electrical method and apparatus for non-invasively detecting abnormal flow in conduitsExpiredApr 07, 81Jan 17, 84[A61B]
4405309 Surgical drainage device with metered air pumpExpiredApr 21, 81Sep 20, 83[A61M]
4396386 Surgical drainage apparatus with suction control and indicationExpiredMay 07, 81Aug 02, 83[A61M]
4344035 Method and apparatus for determination of changes in the surface charge of materialsExpiredNov 10, 80Aug 10, 82[G01N]
4324244 Two-chamber underwater drainage apparatus with oneway outflow valve and dual hangar retainersExpiredFeb 11, 80Apr 13, 82[A61M]
4312351 Drainage device with separate outflow chamberExpiredDec 26, 79Jan 26, 82[A61M]
4296748 Underwater drainage apparatus with separable suction control chamberExpiredJun 27, 79Oct 27, 81[A61M]
4274937 Apparatus for sensing electrical potentialsExpiredAug 07, 79Jun 23, 81[G01N]
4261362 Underwater drainage apparatus with reduced dead air spaceExpiredSep 07, 79Apr 14, 81[A61M]
4249523 Adjustable orthopedic foot splintExpiredMay 07, 79Feb 10, 81[A61F]
4231354 Pulsatile blood pumping apparatus and methodExpiredJul 14, 78Nov 04, 80[A61F, A61M]

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