BTUS, L.L.C.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F03B MACHINES OR ENGINES FOR LIQUIDS 222
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 164
 
  
 
F04D NON-POSITIVE-DISPLACEMENT PUMPS173
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS149

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6220603 Non retractable segmented packing ring for fluid turbines having special springs to reduce forces during shaft rubbingJul 13, 98Apr 24, 01[F16J]
5575618 Steam turbine steam strainerNov 27, 95Nov 19, 96[F03B]
5439347 Turbine tip seal damage protection meansAug 31, 94Aug 08, 95[F01D]
5271712 Turbine geometry to reduce damage from hard particlesJan 06, 93Dec 21, 93[F03B]
5234318 Clip-on radial tip seals for steam and gas turbinesJan 22, 93Aug 10, 93[F04D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5934684 Retractable segmented packing ring for fluid turbines having gravity springs to neutralize packing segment weight forcesExpiredMay 27, 97Aug 10, 99[F16J]
5810365 Retractable segmented packing rings for fluid turbinesExpiredFeb 27, 97Sep 22, 98[F16J]
5520398 Piston ring assemblies for high temperature sealsExpiredJan 25, 94May 28, 96[F16J]
5511941 Steam turbine shell disassembly methodExpiredJan 30, 95Apr 30, 96[F01D]
5496046 Turbine seal rub protection meansExpiredDec 07, 94Mar 05, 96[F16J]
5486088 Steam turbine steam strainerExpiredNov 25, 94Jan 23, 96[F03B]
5484260 Steam turbine bell sealsExpiredJun 08, 95Jan 16, 96[F01D]
5443589 Steam turbine bell sealsExpiredDec 30, 93Aug 22, 95[F01D]

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