Harshaw/Filtrol Partnership

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5116456 Apparatus and method for growth of large single crystals in plate/slab formExpiredApr 18, 88May 26, 92[C30B]
5004711 Process of producing colloidal zirconia sols and powders using an ion exchange resinExpiredOct 13, 89Apr 02, 91[C04B, C01G]
4900711 Hydrotreating catalystExpiredMar 23, 88Feb 13, 90[B01J]
4839090 Extrusion of macrocrystal scientillation phosphorsExpiredAug 03, 83Jun 13, 89[C09K]
4835388 Thermoluminescence dosimetry card reader heating assemblyExpiredApr 07, 87May 30, 89[G01T]
4827132 TLD apparatus and methodExpiredOct 30, 86May 02, 89[G01T]
4772792 Pulser stabilized radiation detectorExpiredJan 10, 85Sep 20, 88[G01T]
4727253 TLD card readerExpiredApr 09, 85Feb 23, 88[G01T]
4699081 Means for detecting and adjusting metal salt concentration in an electroless plating bathExpiredAug 25, 86Oct 13, 87[C23C]
D291286 Automated thermoluminescence dosimetry systemExpiredAug 09, 84Aug 11, 87[]
4676817 Method and apparatus for forming a hermetic seal between glass and metalExpiredAug 25, 86Jun 30, 87[C03C]
4677300 Radiation detection and acquisition systemExpiredAug 03, 84Jun 30, 87[G01T]
4666879 Extruded copper chromite-alumina hydrogenation catalystExpiredSep 11, 85May 19, 87[B01J]
4658141 Inorganic scintillator crystal having a highly reflective surfaceExpiredApr 03, 84Apr 14, 87[G01T]
4631409 Scintillator crystal having a highly reflective surfaceExpiredApr 03, 84Dec 23, 86[G01T]
4624710 Pigment consisting of a mixture of chromium oxide and iron oxide useful in high infra red reflectance gray vinyl compositionExpiredSep 30, 85Nov 25, 86[C04B, C09C, C08K]
4586785 Sodium iodide, light pipeExpiredJun 25, 84May 06, 86[G02B]
4533489 Formable light reflective compositionsExpiredDec 07, 83Aug 06, 85[C09K]
4522865 Hot press-forging of an optical body with dynamic constraint by crystal powderExpiredAug 18, 83Jun 11, 85[B32B]
4512961 Dealumination of faujasite-type zeolites using ion exchange resinsExpiredAug 22, 83Apr 23, 85[C01B]

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