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.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →