DR. HERFELD GMBH & CO. KG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 636
 
  
 
B29B PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS 126
 
  
 
F28D HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 144
 
  
 
F28F DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 151

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8979354 Mixing machineMay 26, 10Mar 17, 15[B29B, F28D, F28F, B01F]
8678639 Mixing machineMar 04, 10Mar 25, 14[B01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5358332 Mixing device having axially adjustable mixing bladesExpiredOct 01, 93Oct 25, 94[B01F]
5123747 Clamping and aligning means for a mixerExpiredSep 25, 89Jun 23, 92[B01F]
5054933 Mixing device with means to introduce and extract gaseous materialExpiredSep 18, 89Oct 08, 91[B01F]
4957373 Method and apparatus for mixing bulk materials in powdered or granular formExpiredSep 18, 89Sep 18, 90[B01F]
4930897 MixerExpiredMar 02, 88Jun 05, 90[B29B, B01F]
4918665 Apparatus for mixing materialExpiredJan 27, 87Apr 17, 90[B01F]
4781468 Mixing apparatusExpiredNov 24, 86Nov 01, 88[B01F]
4676658 Mixing apparatusExpiredAug 26, 85Jun 30, 87[B01F]
4671666 Mixing deviceExpiredJul 12, 85Jun 09, 87[B01F]
4372686 Double-cone rotating mixerExpiredMay 20, 81Feb 08, 83[B01F]

Top Inventors for This Owner

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