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BLACK CLAWSON CO

Overview
  • Total Patents
    1,391
About

BLACK CLAWSON CO has a total of 1,391 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets textiles and paper, machines and chemical engineering are BELOIT CORP, FREIBERG PAPIER MASCHWERKE and VOITH SULZER PAPER TECHNOLOGY.

Patent filings per year

Chart showing BLACK CLAWSON COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Seifert Peter 83
#2 Chupka David E 79
#3 Notbohm Willard C 37
#4 Staege Stephen A 36
#5 Phelps Richard W 35
#6 Kutter Herman L 35
#7 Markham Larry D 29
#8 Baxter Jr Joseph 29
#9 Seifert P 29
#10 Hatton Derald R 27

Latest patents

Publication Filing date Title
US5845867A Continuous winder
WO9727990A1 Extrusion die with adjusting sliding die lips
GB9623727D0 Zoned pressure screen
TW357209B Machine profiled screen cylinder for screening paper makiing stock
AU6768096A Extended dwell reverse hydrocyclone cleaner
US5711153A Precision hydraulic adjustable stop
CN1195302A Forward or reverse hydrocyclone systems and methods
US5762756A Methods and apparatus for pulping and deinking
US5599098A Extruder screw with multiple flighting
US5599097A Extruder screw for plastic extruders
EP0793747A1 Methods for pulping and deinking
WO9609433A1 Paper pulp washing method
US5591336A Apparatus for dewatering and or washing papermaking stock
WO9505248A1 Slotted screen for paper stock
WO9424033A1 Continuous winder for web materials
US5385240A Screening apparatus with adjustable hydrofoil portion
WO9309285A1 Apparatus and method for washing cellulosic pulp
US5324389A Waste paper disintegration, classification and pulping system
WO9300471A1 Fibrous stock forming unit
US5356496A Splice tail tape-down method and apparatus