PRE-TECH CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B08B CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL 454
 
  
 
F26B DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM 129

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7103990 Rotary silicon wafer cleaning apparatusSep 11, 03Sep 12, 06[F26B]
6050276 Apparatus and method for cleaning a precision substrateFeb 12, 98Apr 18, 00[B08B]
6003527 Cleaning apparatus and a cleaning methodOct 27, 97Dec 21, 99[B08B]
5985811 Cleaning solution and cleaning methodJan 08, 97Nov 16, 99[B08B]
5927305 Cleaning apparatusFeb 19, 97Jul 27, 99[B08B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5733434 Apparatus and method for cleaning semiconductor wafersExpiredMay 16, 96Mar 31, 98[C02F]
5725753 Apparatus and method for cleaning semiconductor wafersExpiredApr 26, 96Mar 10, 98[C02F]
5186192 Apparatus for cleaning silicon waferExpiredDec 10, 91Feb 16, 93[B08B]

Top Inventors for This Owner

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