FRIEDRICH THEYSOHN GMBH

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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 141
 
  
 
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
5474720 Method of and apparatus for producing elongated shaped bodies of thermoplastic synthetic resinMar 11, 94Dec 12, 95[B29C]
5350231 Double worm extruder with meshing screwsOct 27, 93Sep 27, 94[B01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5405660 Method of generating a wear-reducing layer on a plastifying worm or screwExpiredOct 18, 93Apr 11, 95[B05D, B23K]
5388976 Wall thickness measuring device with calibration deviceExpiredFeb 25, 93Feb 14, 95[B29C]
5382146 Control device for the mechanical thermal adjustment of the nozzle of an extruder for elongate productsExpiredOct 13, 93Jan 17, 95[B29C]
5362146 Plastifier with disk and pin throttle for plastic materialsExpiredMar 14, 94Nov 08, 94[B29B]
5352539 Extruder housing for double-screw extruder having an annularly stepped internal bore covered by a hot isostatically-pressed structure, and method of making sameExpiredOct 27, 92Oct 04, 94[A23P, B22F, B01F]
5302106 Double-worm extruder with polygonal-disk kneaderExpiredJul 10, 92Apr 12, 94[B29C]
5255973 Plastifier with throttle meansExpiredJun 11, 92Oct 26, 93[B29B]
5238165 Extrudate hauler with upper and lower endless tracks with yaw adjustmentExpiredNov 18, 91Aug 24, 93[B65H]
5169650 Calibration unit for extruded plastic materialExpiredDec 04, 90Dec 08, 92[B29C]
5139402 Floating plastics section calibrating deviceExpiredDec 04, 90Aug 18, 92[B29C]

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