Assignee
LEARONAL INC
US53 patents
Top patents by PatentIndex Score
US5750018AMay 12, 1998
Cyanide-free monovalent copper electroplating solutions
LEARONAL INC52 citations95
US4871429AOct 3, 1989
Limiting tin sludge formation in tin or tin/lead electroplating solutions
LEARONAL INC75 citations95
US4378270AMar 29, 1983
Method of etching circuit boards and recovering copper from the spent etch solutions
LEARONAL INC51 citations95
US6071398AJun 6, 2000
Programmed pulse electroplating process
LEARONAL INC78 citations94
US5174887ADec 29, 1992
High speed electroplating of tinplate
LEARONAL INC56 citations94
US5302278AApr 12, 1994
Cyanide-free plating solutions for monovalent metals
LEARONAL INC43 citations93
US5256275AOct 26, 1993
Electroplated gold-copper-silver alloys
LEARONAL INC35 citations92
US5085744AFeb 4, 1992
Electroplated gold-copper-zinc alloys
LEARONAL INC23 citations92
US4717460AJan 5, 1988
Tin lead electroplating solutions
LEARONAL INC28 citations92
US4701244AOct 20, 1987
Bath and process for electroplating tin, lead and tin/alloys
LEARONAL INC31 citations92
US4681670AJul 21, 1987
Bath and process for plating tin-lead alloys
LEARONAL INC33 citations92
US4640746AFeb 3, 1987
Bath and process for plating tin/lead alloys on composite substrates
LEARONAL INC28 citations92
US4628165ADec 9, 1986
Electrical contacts and methods of making contacts by electrodeposition
LEARONAL INC48 citations92
US4617097AOct 14, 1986
Process and electrolyte for electroplating tin, lead or tin-lead alloys
LEARONAL INC32 citations92
US4565610AJan 21, 1986
Bath and process for plating lead and lead/tin alloys
LEARONAL INC42 citations91
US4565609AJan 21, 1986
Bath and process for plating tin, lead and tin-lead alloys
LEARONAL INC43 citations91
US5312539AMay 17, 1994
Electrolytic tin plating method
LEARONAL INC47 citations89
US4847114AJul 11, 1989
Preparation of printed circuit boards by selective metallization
LEARONAL INC26 citations89
US4520046AMay 28, 1985
Metal plating on plastics
LEARONAL INC30 citations89
US4591415AMay 27, 1986
Plating baths and methods for electro-deposition of gold or gold alloys
LEARONAL INC38 citations87
US6210556B1Apr 3, 2001
Electrolyte and tin-silver electroplating process
LEARONAL INC32 citations86
US5378347AJan 3, 1995
Reducing tin sludge in acid tin plating
LEARONAL INC27 citations86
US5492615AFeb 20, 1996
Cyclodextrin stabilization of organic metal finishing additives in aqueous metal treating baths
LEARONAL INC23 citations85
US5106473AApr 21, 1992
Process for metallizing a through-hole board
LEARONAL INC22 citations83
US4904354AFeb 27, 1990
Akaline cyanide-free Cu-Zu strike baths and electrodepositing processes for the use thereof
LEARONAL INC29 citations83
US5066367ANov 19, 1991
Limiting tin sludge formation in tin or tin/lead electroplating solutions
LEARONAL INC19 citations81
US4762560AAug 9, 1988
Copper colloid and method of activating insulating surfaces for subsequent electroplating
LEARONAL INC18 citations81
US4599149AJul 8, 1986
Process for electroplating tin, lead and tin-lead alloys and baths therefor
LEARONAL INC23 citations80
US4994155AFeb 19, 1991
High speed tin, lead or tin/lead alloy electroplating
LEARONAL INC21 citations78
US4880507ANov 14, 1989
Tin, lead or tin/lead alloy electrolytes for high speed electroplating
LEARONAL INC19 citations78
US4233344ANov 11, 1980
Method of improving the adhesion of electroless metal deposits employing colloidal copper activator
LEARONAL INC20 citations78
US4490220ADec 25, 1984
Electrolytic copper plating solutions
LEARONAL INC23 citations75
US4478692AOct 23, 1984
Electrodeposition of palladium-silver alloys
LEARONAL INC13 citations74
US4465563AAug 14, 1984
Electrodeposition of palladium-silver alloys
LEARONAL INC12 citations74
US5094726AMar 10, 1992
Limiting tin sludge formation in tin or tin-lead electroplating solutions
LEARONAL INC14 citations73
US4877450AOct 31, 1989
Formaldehyde-free electroless copper plating solutions
LEARONAL INC17 citations73
US4681630AJul 21, 1987
Method of making copper colloid for activating insulating surfaces
LEARONAL INC9 citations73
US4622110ANov 11, 1986
Palladium plating
LEARONAL INC6 citations73
US4545868AOct 8, 1985
Palladium plating
LEARONAL INC10 citations73
US4399006AAug 16, 1983
Silver plating
LEARONAL INC11 citations72
US4247372AJan 27, 1981
Silver plating
LEARONAL INC9 citations72
USRE35513EMay 20, 1997
Cyanide-free plating solutions for monovalent metals
LEARONAL INC12 citations71
US4759952AJul 26, 1988
Process for printed circuit board manufacture
LEARONAL INC14 citations70
US4582729AApr 15, 1986
Process for electro-magnetic interference shielding
LEARONAL INC15 citations70
US4556587ADec 3, 1985
Process for electro-magnetic interference shielding
LEARONAL INC7 citations70
US5522972AJun 4, 1996
Nickel hypophosphite manufacture
LEARONAL INC9 citations69
US5427677AJun 27, 1995
Flux for reflowing tinplate
LEARONAL INC11 citations69
US4919720AApr 24, 1990
Electroless gold plating solutions
LEARONAL INC11 citations66
US5578182ANov 26, 1996
Electrolytic production of hypophosphorous acid
LEARONAL INC4 citations63
US4741818AMay 3, 1988
Alkaline baths and methods for electrodeposition of palladium and palladium alloys
LEARONAL INC4 citations63
Showing the top 50 of 53 patents by PatentIndex Score.