Werner & Pfleiderer GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
A21C MACHINES OR EQUIPMENT FOR MAKING OR PROCESSING DOUGHS; HANDLING BAKED ARTICLES MADE FROM DOUGH412
 
  
 
A21D TREATMENT, e.g. PRESERVATION, OF FLOUR OR DOUGH FOR BAKING, e.g. BY ADDITION OF MATERIALS; BAKING; BAKERY PRODUCTS; PRESERVATION THEREOF 123
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 141
 
  
 
B28C PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER 114

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7648356 System for producing a strip of dough from a strip of raw dough and set of planetary rollers for use in such a systemOct 01, 07Jan 19, 10[A21C]
5573332 Screw element for a screw-like extrusion machineFeb 28, 96Nov 12, 96[B28C, A21C, B01F]
5242698 Process and apparatus for controlling a dough making machineDec 16, 92Sep 07, 93[A21D, A21C]
5211968 Dough dividing machineDec 18, 91May 18, 93[A21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5620130 Process for producing a die plate for underwater granulation of plastic material with an intermediate nickel alloy layerExpiredJul 11, 95Apr 15, 97[B23K]
5549383 Screw-type extrusion machine with heating elementsExpiredOct 25, 91Aug 27, 96[B01F]
5518439 Process and apparatus for the finish grinding of cutting tools of a granulating deviceExpiredApr 18, 94May 21, 96[B24B]
5499869 Device for adjusting the pressure of the plastic material in a screw extruderExpiredOct 11, 94Mar 19, 96[B29C, B28C]
5378135 Apparatus for aligning the cutting surfaces of cutting blades of a granulating deviceExpiredJun 17, 93Jan 03, 95[B29C]
5338112 Process and apparatus for two stage treatment of plastic materialsExpiredMay 05, 92Aug 16, 94[B01F]
5335991 Plastic melt extruder having an adjustable throttling gap of non-uniform widthExpiredJun 25, 93Aug 09, 94[B29B]
5332308 Process and apparatus for production of plastics containing additivesExpiredOct 27, 92Jul 26, 94[B28C, B01F]
5318358 Screw kneader for plastic material having a controlling mixing sectionExpiredOct 15, 92Jun 07, 94[B29B, B01F]
5309947 Apparatus for lining an inside wall of a sewer pipeExpiredMay 22, 92May 10, 94[F16L]
5310256 Apparatus for mixing and processing plastic material including a delivery pumpExpiredApr 21, 92May 10, 94[B01F]
5308562 Recycling process and apparatus for the production of polymer from thermoplastic polycondensateExpiredFeb 09, 93May 03, 94[B29C]
5306132 Process and apparatus for degassing plastic melt in a screw extruderExpiredFeb 26, 91Apr 26, 94[B29C]
5297864 Degassing means for a twin screw extruder for plastic materialsExpiredJul 26, 93Mar 29, 94[B29B, B01F]
5222738 Gambling deviceExpiredDec 31, 91Jun 29, 93[A63H, A63F]
5223279 Granulating device for plastic compoundsExpiredApr 20, 92Jun 29, 93[B28B, B29C]
5203256 Continuous fermenting chamber for dough productsExpiredJun 10, 92Apr 20, 93[A21D, A21C]
5187880 Centrifugal dryer for separation of surface water from plastic granulesExpiredJan 15, 92Feb 23, 93[F25B]
5171022 Shaft seal of a mixing and kneading machineExpiredFeb 04, 92Dec 15, 92[F16J]
5143673 Process and apparatus for underwater granulation of molten thermoplastic material particularly during start-up periodsExpiredNov 19, 90Sep 01, 92[B29B]

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