LEYBOLD-HERAEUS GMBH

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5201926 Method for the production of coated glass with a high transmissivity in the visible spectral range and with a high reflectivity for thermal radiationExpiredAug 08, 88Apr 13, 93[C03C]
5098069 Equipment and regulating means for recovering metal-carbide scrap by alloyingExpiredOct 31, 88Mar 24, 92[F27D]
5044895 Oil supply device for a rotary machineExpiredDec 18, 85Sep 03, 91[F04B]
4919187 Method for making additions to molten alloys and bodies molded from alloying metalsExpiredAug 09, 88Apr 24, 90[B22D, C22C]
4919778 Process for the production of curve glazing with a high transmittance in the visible spectral range and a high reflectance for thermal radiationExpiredMay 19, 89Apr 24, 90[C23C]
4915194 Lubricating oil feed systemExpiredNov 01, 88Apr 10, 90[F01M]
4798521 System and method for regulating pressure in a containerExpiredMay 04, 87Jan 17, 89[F16K, F04B]
4794784 Leak detector calibrating deviceExpiredApr 23, 87Jan 03, 89[G01M, G01D]
4794330 Method and circuit for measuring and displaying physical valuesExpiredFeb 03, 87Dec 27, 88[G01R]
4779449 Leak detector and leak detection methodExpiredOct 15, 87Oct 25, 88[G01M]
4761963 Method of exchanging the displacement element of a refrigerator and refrigerator for implementing the methodExpiredJul 29, 87Aug 09, 88[F25B]
4738832 Crystal holderExpiredApr 03, 85Apr 19, 88[B01D]
4729241 Measuring head for vacuum gaugeExpiredNov 20, 86Mar 08, 88[G01L]
4632650 Vacuum pump having an evacuated gear chamberExpiredDec 12, 84Dec 30, 86[F04C, B01D, F16J]
4605832 Differential bellows pressure switchExpiredJun 04, 84Aug 12, 86[H01H]
4590983 Precision vacuum melting and casting furnace with a melting chamber and a casting chamberExpiredApr 25, 85May 27, 86[B22D]
4589369 Device for holding a substrateExpiredMar 20, 85May 20, 86[B05C]
4562943 Method of and device for controlling the pouring of a meltExpiredJul 08, 83Jan 07, 86[B22D]
4548698 Equipment for producing coatings having a rotationally symmetric thickness profile by cathodic evaporationExpiredFeb 01, 84Oct 22, 85[C23C]
4530100 Vaporizer crucible for vacuum vapor-depositionExpiredJul 07, 83Jul 16, 85[H01J]

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