Sulzer-Escher Wyss GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21F PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON623
 
  
 
B30B PRESSES IN GENERAL; PRESSES NOT OTHERWISE PROVIDED FOR 319
 
  
 
D21G CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES 310
 
  
 
B01D SEPARATION 1133
 
  
 
B02C CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN 134
 
  
 
B03D FLOTATION; DIFFERENTIAL SEDIMENTATION 114
 
  
 
B21B ROLLING OF METAL 131
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5673616 Apparatus for influencing the thickness and gloss and/or smoothness in the treatment of fiber material websFeb 06, 96Oct 07, 97[D21G, B30B]
5635032 Double wire formerApr 12, 95Jun 03, 97[D21F]
5556511 Process for drying paper websDec 15, 94Sep 17, 96[D21F]
5533443 Method for influencing the thickness and gloss and/or smoothness in the treatment of fiber material websJun 07, 94Jul 09, 96[D21G]
5520344 Apparatus for the comminution of suspended fibre materialJan 14, 94May 28, 96[B02C]
5431785 Multilayer head box for a paper machineJul 22, 93Jul 11, 95[D21F]
5400708 Supporting connections between two rollsJan 25, 93Mar 28, 95[D21G, B30B]
5393290 Roll with adjustable deflectionDec 21, 92Feb 28, 95[B23P]
5320713 Method of using a forming section of a papermaking machineMay 20, 93Jun 14, 94[D21F]
5308450 Press section of a papermaking machineApr 15, 92May 03, 94[D21F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5916446 Process and apparatus for the separation of solid matter via flotationExpiredApr 30, 97Jun 29, 99[B03D, B04C]
5785815 Process for damping pressure pulsations and apparatus for performing the processExpiredDec 13, 94Jul 28, 98[D21F]
5690812 Process and apparatus for the separation of solid matter via flotationExpiredNov 02, 95Nov 25, 97[B03D, B04C]
5551171 Winding device for a fiber webExpiredAug 15, 94Sep 03, 96[F26B]
5509536 Method and apparatus for the sorting of fiber suspensionsExpiredMar 15, 94Apr 23, 96[B07B]
5510039 Method for separating off solid materialsExpiredApr 15, 94Apr 23, 96[C02F]
5469784 Calender assembly including an additional roll displaced into the path of the web of materialExpiredApr 26, 94Nov 28, 95[D21G, B30B]
5465502 Suction roll in particular for a paper web dryerExpiredJul 19, 93Nov 14, 95[F26B, D21F]
5456645 RollExpiredJun 30, 93Oct 10, 95[B23P]
5437850 Method for calcining moist gypsumExpiredJun 02, 94Aug 01, 95[C04B]
5431321 Roll for web pressing or web guidingExpiredSep 16, 94Jul 11, 95[F16C, B65H]
5431787 Press section of a papermaking machineExpiredOct 25, 93Jul 11, 95[D21F]
5417806 Method of removing fine contaminants from used paper fibre materialExpiredOct 19, 92May 23, 95[D21B]
5406883 Dewatering press for compressibly dewaterable materialExpiredApr 09, 93Apr 18, 95[B30B]
5390592 Dewatering press for compressibly dewaterable materialExpiredApr 09, 93Feb 21, 95[B30B]
5387782 Apparatus for smoothing paper websExpiredApr 14, 92Feb 07, 95[H05B]
5383833 Roll for heating or cooling running websExpiredJul 14, 93Jan 24, 95[B21B]
5371954 Method and apparatus for the guiding of fibre websExpiredDec 18, 92Dec 13, 94[F26B, D21F]
5347728 Suction roll, especially for a paper web drierExpiredJul 14, 92Sep 20, 94[F26B, D21F]
5318670 Method for the generation of smoothness and gloss of a paper webExpiredAug 06, 92Jun 07, 94[D21H, D21G]

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