PPV-Verwaltungs-AG

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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Expired/Abandoned/Withdrawn Patents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
5679236 Method and apparatus for the production of a fuel mixtureExpiredFeb 01, 96Oct 21, 97[C25C, C25B]
5593480 Apparatus for the oxygen enrichment of airExpiredJul 11, 95Jan 14, 97[B01D]
5584322 Rotary slide valveExpiredNov 29, 95Dec 17, 96[F16K]
5582090 Radial piston pump with rotary expansible chamber stageExpiredSep 28, 92Dec 10, 96[F04B]
5569029 BurnerExpiredNov 14, 94Oct 29, 96[F23L]
5564402 Arrangement for the pressure atomization of liquid fuel and process for the sameExpiredJan 13, 95Oct 15, 96[F02M]
5565727 Holder for ultrasonic power convertersExpiredDec 09, 94Oct 15, 96[H01L]
5540614 Apparatus for grinding workpiecesExpiredAug 05, 94Jul 30, 96[B24B]
5530032 Method for the production of integral skin foamExpiredDec 15, 94Jun 25, 96[G08J]
5490727 Disc-shaped mixing tool with conically beveled through bonesExpiredJan 13, 95Feb 13, 96[B01F]
5237907 Radial piston machine having working fluid passing through the crankcaseExpiredDec 26, 89Aug 24, 93[F04B, F01B]

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