P

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 patents
US5780741AJul 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 patents

Showing the top 50 of 53 patents by PatentIndex Score.