Inventor
RAJ KULDIP
US53 patents
⚠️ This page may combine multiple inventors who share the name “RAJ KULDIP”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FERROFLUIDICS CORP
48 patentsUS5780741AJul 14, 1998
Sensor employing a sliding magnet suspended on ferrofluid
FERROFLUIDICS CORP59 citations96
US4898480AFeb 6, 1990
Compact ferrofluidic electrically conducting sealed bearing
FERROFLUIDICS CORP57 citations96
US4673997AJun 16, 1987
Electrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used therein
FERROFLUIDICS CORP61 citations96
US4604222AAug 5, 1986
Stable ferrofluid composition and method of making and using same
FERROFLUIDICS CORP60 citations96
US4604229AAug 5, 1986
Electrically conductive ferrofluid compositions and method of preparing and using same
FERROFLUIDICS CORP79 citations96
US5461677AOct 24, 1995
Loudspeaker
FERROFLUIDICS CORP55 citations94
US5452520ASep 26, 1995
Ferrofluid inclinometer
FERROFLUIDICS CORP65 citations94
US5969589AOct 19, 1999
Quiet ferrofluid solenoid
FERROFLUIDICS CORP27 citations93
US5955934ASep 21, 1999
Quiet ferrofluid solenoid with cushion
FERROFLUIDICS CORP32 citations93
US5908987AJun 1, 1999
Sensor employing a sliding ferrofluid mass in a coated, non-wetting, housing
FERROFLUIDICS CORP45 citations93
US4531846AJul 30, 1985
Compact ferrofluid seal and bearing assembly
FERROFLUIDICS CORP32 citations93
US4506895AMar 26, 1985
Self-activating ferrofluid seal apparatus and method of use
FERROFLUIDICS CORP35 citations93
US4357024ANov 2, 1982
Ferrofluid rotary-shaft seal apparatus and method
FERROFLUIDICS CORP39 citations93
US6290894B1Sep 18, 2001
Ferrofluid sculpting apparatus
FERROFLUIDICS CORP44 citations92
US5462685AOct 31, 1995
Ferrofluid-cooled electromagnetic device and improved cooling method
FERROFLUIDICS CORP44 citations92
US4830384AMay 16, 1989
Compact long-life magnetic fluid seal
FERROFLUIDICS CORP29 citations92
US4824122AApr 25, 1989
Compact magnetic fluid low pressure seal
FERROFLUIDICS CORP35 citations92
US4797013AJan 10, 1989
Compact ferrofluidic electrically conducting sealed bearing
FERROFLUIDICS CORP39 citations92
US4732706AMar 22, 1988
Method of preparing low viscosity, electrically conductive ferrofluid composition
FERROFLUIDICS CORP46 citations92
US4687596AAug 18, 1987
Low viscosity, electrically conductive ferrofluid composition and method of making and using same
FERROFLUIDICS CORP52 citations92
US4575102AMar 11, 1986
Coaxial, multiple-shaft ferrofluid seal apparatus
FERROFLUIDICS CORP40 citations92
US4527805AJul 9, 1985
High-pressure ferrofluid seal apparatus
FERROFLUIDICS CORP34 citations92
US4526382AJul 2, 1985
Radially polarized multiple-stage ferrofluid seal apparatus
FERROFLUIDICS CORP31 citations92
US4502700AMar 5, 1985
Ferrofluid linear seal apparatus
FERROFLUIDICS CORP32 citations92
US5851416ADec 22, 1998
Stable polysiloxane ferrofluid compositions and method of making same
FERROFLUIDICS CORP21 citations91
US4692826ASep 8, 1987
Bearing assembly with integrated ferrofluid seal
FERROFLUIDICS CORP44 citations91
US4628384ADec 9, 1986
Bearing assembly with integrated ferrofluid seal
FERROFLUIDICS CORP46 citations91
US4407508AOct 4, 1983
Single-pole-piece ferrofluid seal apparatus and exclusion seal system
FERROFLUIDICS CORP54 citations91
US4252353AFeb 24, 1981
Self-activating ferrofluid seals
FERROFLUIDICS CORP34 citations91
US4407518AOct 4, 1983
Nonbursting multiple-stage ferrofluid seal and system
FERROFLUIDICS CORP41 citations90
US4445696AMay 1, 1984
Nonbursting magnetic liquid seals for high vacuum applications
FERROFLUIDICS CORP38 citations89
US5490425AFeb 13, 1996
Ferrofluid pressure sensor and warning device
FERROFLUIDICS CORP19 citations85
US6068785AMay 30, 2000
Method for manufacturing oil-based ferrofluid
FERROFLUIDICS CORP17 citations82
US4772032ASep 20, 1988
Compact magnetic fluid low pressure seal
FERROFLUIDICS CORP20 citations82
US4526379AJul 2, 1985
Stabilized ferrofluid-ferrofluid seal apparatus and method
FERROFLUIDICS CORP25 citations82
US4526380AJul 2, 1985
Single pole piece multiple-stage ferrofluid seal apparatus
FERROFLUIDICS CORP25 citations82
US4478424AOct 23, 1984
Ferrofluid seal apparatus and method
FERROFLUIDICS CORP23 citations82
US4357022ANov 2, 1982
Ferrofluid rotary-shaft seal apparatus and method
FERROFLUIDICS CORP23 citations82
US4340233AJul 20, 1982
Ferrofluid seal apparatus
FERROFLUIDICS CORP22 citations82
US4890850AJan 2, 1990
Tapered ferrofluid seal
FERROFLUIDICS CORP21 citations81
US4865334ASep 12, 1989
Long-life multi-stage ferrofluid seals incorporating a ferrofluid reservoir
FERROFLUIDICS CORP22 citations80
US4252328AFeb 24, 1981
Self-activating ferrofluid seal and method
FERROFLUIDICS CORP27 citations80
US4357021ANov 2, 1982
Ferrofluid rotary-shaft seal apparatus and method
FERROFLUIDICS CORP21 citations76
US6254781B1Jul 3, 2001
Method for recycling ferrofluid constituents used in a materials separation process
FERROFLUIDICS CORP14 citations74
US6103107AAug 15, 2000
System for recycling ferrofluid constituents used in a materials separation process
FERROFLUIDICS CORP10 citations74
US5429000AJul 4, 1995
Ferrofluid pressure sensor
FERROFLUIDICS CORP18 citations74
US5018751AMay 28, 1991
Stacked pole-piece ferrofluid seal apparatus
FERROFLUIDICS CORP19 citations71
US4927164AMay 22, 1990
Ferrofluid seal with epoxy pole pieces
FERROFLUIDICS CORP12 citations71
FERROTEC USA CORP
2 patentsShowing the top 50 of 53 patents by PatentIndex Score.