Esco Ltd

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
B41C PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES 116
 
  
 
B41M PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING 148
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 1127

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5569837 Detector apparatus of desorption gas and method thereforeSep 20, 94Oct 29, 96[G01N]
5528032 Thermal desorption gas spectrometerMar 22, 94Jun 18, 96[H01J, B01D]
RE31412 Pressure-and-heat-sensitive copying paperMay 27, 80Oct 11, 83[B41M, B41C, B32B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6217643 Color former composition and microcapsules containing the compositionExpiredFeb 07, 00Apr 17, 01[C09D]
5008464 Anisole brominationExpiredMay 29, 90Apr 16, 91[C07C]
4910183 Fluoran derivatives and their use in recording materialsExpiredMar 31, 89Mar 20, 90[B41M]
4837210 Fluoran derivatives and their use in recording materialsExpiredJan 27, 87Jun 06, 89[C07D]
4480187 Mass spectrometerExpiredJul 27, 82Oct 30, 84[B01D]
4330473 Recording materialExpiredNov 26, 80May 18, 82[C07D]

Top Inventors for This Owner

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