Assignee
FERROFLUIDICS CORP
US·84 granted patents·2,961 citations·filing 1974–2000
Top patents by PatentIndex Score
84 records- 0198US4356098AStable ferrofluid compositions and method of making sameFERROFLUIDICS CORP·Filed 1980·Granted Oct 26, 1982·112 cites·23 claims
- 0297US4604229AElectrically conductive ferrofluid compositions and method of preparing and using sameFERROFLUIDICS CORP·Filed 1985·Granted Aug 5, 1986·79 cites·24 claims
- 0397US4430239AFerrofluid composition and method of making and using sameFERROFLUIDICS CORP·Filed 1983·Granted Feb 7, 1984·84 cites·29 claims
- 0495US4171818ADynamic lip seal using ferrofluids as sealant/lubricantFERROFLUIDICS CORP·Filed 1977·Granted Oct 23, 1979·88 cites·9 claims
- 0594US4673997AElectrically conductive ferrofluid bearing and seal apparatus and low-viscosity electrically conductive ferrofluid used thereinFERROFLUIDICS CORP·Filed 1985·Granted Jun 16, 1987·61 cites·17 claims
- 0693US4604222AStable ferrofluid composition and method of making and using sameFERROFLUIDICS CORP·Filed 1985·Granted Aug 5, 1986·60 cites·30 claims
- 0792US4407508ASingle-pole-piece ferrofluid seal apparatus and exclusion seal systemFERROFLUIDICS CORP·Filed 1982·Granted Oct 4, 1983·54 cites·13 claims
- 0892US4350560AApparatus for and method of handling crystals from crystal-growing furnacesFERROFLUIDICS CORP·Filed 1981·Granted Sep 21, 1982·92 cites·17 claims
- 0991US4898480ACompact ferrofluidic electrically conducting sealed bearingFERROFLUIDICS CORP·Filed 1988·Granted Feb 6, 1990·57 cites·18 claims
- 1091US4350557AMethod for circumferential dimension measuring and control in crystal rod pullingFERROFLUIDICS CORP·Filed 1981·Granted Sep 21, 1982·42 cites·18 claims
- 1190US4687596ALow viscosity, electrically conductive ferrofluid composition and method of making and using sameFERROFLUIDICS CORP·Filed 1986·Granted Aug 18, 1987·52 cites·23 claims
- 1290US4630943AFerrofluid bearing and seal apparatusFERROFLUIDICS CORP·Filed 1986·Granted Dec 23, 1986·65 cites·5 claims
- 1390US4123675AInertia damper using ferrofluidFERROFLUIDICS CORP·Filed 1977·Granted Oct 31, 1978·51 cites·14 claims
- 1490US3977739AMagnetic ball bearing assembly using ferrolubricantsFERROFLUIDICS CORP·Filed 1974·Granted Aug 31, 1976·64 cites·3 claims
- 1589US4694213AFerrofluid seal for a stationary shaft and a rotating hubFERROFLUIDICS CORP·Filed 1986·Granted Sep 15, 1987·67 cites·21 claims
- 1689US4628384ABearing assembly with integrated ferrofluid sealFERROFLUIDICS CORP·Filed 1984·Granted Dec 9, 1986·46 cites·15 claims
- 1788US4315827ALow-vapor-pressure ferrofluids and method of making sameFERROFLUIDICS CORP·Filed 1981·Granted Feb 16, 1982·42 cites·29 claims
- 1887US5462685AFerrofluid-cooled electromagnetic device and improved cooling methodFERROFLUIDICS CORP·Filed 1993·Granted Oct 31, 1995·44 cites·24 claims
- 1987US4824122ACompact magnetic fluid low pressure sealFERROFLUIDICS CORP·Filed 1988·Granted Apr 25, 1989·35 cites·14 claims
- 2087US4732706AMethod of preparing low viscosity, electrically conductive ferrofluid compositionFERROFLUIDICS CORP·Filed 1987·Granted Mar 22, 1988·46 cites·13 claims
- 2187US4575102ACoaxial, multiple-shaft ferrofluid seal apparatusFERROFLUIDICS CORP·Filed 1984·Granted Mar 11, 1986·40 cites·7 claims
- 2287US4444398ASelf-activating ferrofluid seal apparatus and methodFERROFLUIDICS CORP·Filed 1983·Granted Apr 24, 1984·42 cites·22 claims
- 2386US4357024AFerrofluid rotary-shaft seal apparatus and methodFERROFLUIDICS CORP·Filed 1980·Granted Nov 2, 1982·39 cites·18 claims
- 2485US4692826ABearing assembly with integrated ferrofluid sealFERROFLUIDICS CORP·Filed 1986·Granted Sep 8, 1987·44 cites·15 claims
- 2585US4407518ANonbursting multiple-stage ferrofluid seal and systemFERROFLUIDICS CORP·Filed 1983·Granted Oct 4, 1983·41 cites·15 claims
- 2684US4527805AHigh-pressure ferrofluid seal apparatusFERROFLUIDICS CORP·Filed 1984·Granted Jul 9, 1985·34 cites·10 claims
- 2784US4506895ASelf-activating ferrofluid seal apparatus and method of useFERROFLUIDICS CORP·Filed 1984·Granted Mar 26, 1985·35 cites·18 claims
- 2883US5955934AQuiet ferrofluid solenoid with cushionFERROFLUIDICS CORP·Filed 1998·Granted Sep 21, 1999·32 cites·18 claims
- 2983US5452520AFerrofluid inclinometerFERROFLUIDICS CORP·Filed 1994·Granted Sep 26, 1995·65 cites·10 claims
- 3083US4797013ACompact ferrofluidic electrically conducting sealed bearingFERROFLUIDICS CORP·Filed 1987·Granted Jan 10, 1989·39 cites·9 claims
- 3182US5908987ASensor employing a sliding ferrofluid mass in a coated, non-wetting, housingFERROFLUIDICS CORP·Filed 1997·Granted Jun 1, 1999·45 cites·12 claims
- 3282US4531846ACompact ferrofluid seal and bearing assemblyFERROFLUIDICS CORP·Filed 1983·Granted Jul 30, 1985·32 cites·8 claims
- 3382US4502700AFerrofluid linear seal apparatusFERROFLUIDICS CORP·Filed 1984·Granted Mar 5, 1985·32 cites·19 claims
- 3482US4445696ANonbursting magnetic liquid seals for high vacuum applicationsFERROFLUIDICS CORP·Filed 1983·Granted May 1, 1984·38 cites·14 claims
- 3581US4526382ARadially polarized multiple-stage ferrofluid seal apparatusFERROFLUIDICS CORP·Filed 1984·Granted Jul 2, 1985·31 cites·12 claims
- 3680US5340122ADifferentially-pumped ferrofluidic sealFERROFLUIDICS CORP·Filed 1992·Granted Aug 23, 1994·50 cites·26 claims
- 3780US4252353ASelf-activating ferrofluid sealsFERROFLUIDICS CORP·Filed 1979·Granted Feb 24, 1981·34 cites·26 claims
- 3880US4200296AFerrofluid centrifugal sealFERROFLUIDICS CORP·Filed 1978·Granted Apr 29, 1980·33 cites·13 claims
- 3979US5969589AQuiet ferrofluid solenoidFERROFLUIDICS CORP·Filed 1996·Granted Oct 19, 1999·27 cites·22 claims
- 4079US5242667ASolid pellet feeder for controlled melt replenishment in continuous crystal growing processFERROFLUIDICS CORP·Filed 1991·Granted Sep 7, 1993·42 cites·33 claims
- 4179US4817964AFerrofluid exclusion seal and method of assemblyFERROFLUIDICS CORP·Filed 1985·Granted Apr 4, 1989·36 cites·15 claims
- 4279US4663128APulling head for a crystal growing furnaceFERROFLUIDICS CORP·Filed 1985·Granted May 5, 1987·29 cites·11 claims
- 4376US5780741ASensor employing a sliding magnet suspended on ferrofluidFERROFLUIDICS CORP·Filed 1997·Granted Jul 14, 1998·59 cites·20 claims
- 4475US6242994B1Apparatus to reduce push back time in solenoid valvesFERROFLUIDICS CORP·Filed 1999·Granted Jun 5, 2001·31 cites·20 claims
- 4575US4772032ACompact magnetic fluid low pressure sealFERROFLUIDICS CORP·Filed 1987·Granted Sep 20, 1988·20 cites·14 claims
- 4675US4252328ASelf-activating ferrofluid seal and methodFERROFLUIDICS CORP·Filed 1980·Granted Feb 24, 1981·27 cites·30 claims
- 4773US5461677ALoudspeakerFERROFLUIDICS CORP·Filed 1994·Granted Oct 24, 1995·55 cites·7 claims
- 4873US4830384ACompact long-life magnetic fluid sealFERROFLUIDICS CORP·Filed 1987·Granted May 16, 1989·29 cites·5 claims
- 4973US4526380ASingle pole piece multiple-stage ferrofluid seal apparatusFERROFLUIDICS CORP·Filed 1984·Granted Jul 2, 1985·25 cites·13 claims
- 5073US4526379AStabilized ferrofluid-ferrofluid seal apparatus and methodFERROFLUIDICS CORP·Filed 1984·Granted Jul 2, 1985·25 cites·19 claims
Showing the top 50 of 84 patent records by PatentIndex Score.
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