HUTCHISON-HAYES INTERNATIONAL, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B04B CENTRIFUGES 324
 
  
 
H05K PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 1155

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6590769 Purge and cooling system for enclosure for hazardous environmentApr 04, 02Jul 08, 03[H05K]
6193076 Drilling fluid purification method and apparatusNov 25, 98Feb 27, 01[B04B]
6155964 Centrifuge drive system providing optimum performanceMar 01, 99Dec 05, 00[B04B]
6030332 Centrifuge system with stacked discs attached to the housingApr 14, 98Feb 29, 00[B04B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6823721 Method and system for mass flow balance accountingExpiredDec 11, 02Nov 30, 04[G01N, B01D]
6823238 Selective apparatus and method for removing an undesirable cut from drilling fluidExpiredMay 26, 00Nov 23, 04[G01N]
2004/0138,040 Decanter centrifuge controlAbandonedJan 15, 03Jul 15, 04[B04B]
6711830 Cuttings treatment systemExpiredAug 06, 02Mar 30, 04[F26B]
6607659 Drilling mud reclamation system with mass flow sensorsExpiredDec 19, 00Aug 19, 03[B04C, E21B]
6432299 Cuttings dryer for removing liquid from a slurryExpiredJul 21, 00Aug 13, 02[B01D]
6230899 Sintered centrifuge separation systemExpiredJan 20, 99May 15, 01[B04B]
6073709 Selective apparatus and method for removing an undesirable cut from drilling fluidExpiredApr 14, 98Jun 13, 00[E21B]
5800332 Decanting centrifuge employing elements with differing rates of rotationExpiredJul 03, 96Sep 01, 98[B04B]
5403260 Automatic frequency controlled motor backdriveExpiredJun 04, 93Apr 04, 95[B04B]
4557142 Apparatus and method for real-time measurement of drilling fluid propertiesExpiredOct 13, 83Dec 10, 85[E21B]

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