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| Number | Title | Issue Date |
| 8118983 | System for inhibiting corrosion of submerged components in a marine propulsion system A corrosion inhibiting system is provided with the ability to allow both primary and secondary portions of the circuit to be used in the alternative without having the primary and secondary systems interfere with each other by operating at the same time. By incorpor... | 02/21/2012 |
| 7857949 | Sacrificial anode with resistor assembly for metal tank corrosion protection A sacrificial metal anode device incorporating a resistor assembly into the construction of the sacrificial anode is insertable into a metal water storage tank. The metal water storage tank designed to contain heated water is thereby protected from corrosion by the ... | 12/28/2010 |
| 7422666 | Photovoltaically powered cathodic protection system for automotive vehicle A photovoltaically powered cathodic protection system for an automotive vehicle uses electrical energy arising from a photovoltaic array positioned upon an exterior surface of the vehicle, with the cathodic protection current being controlled by a controller which i... | 09/09/2008 |
| 7410563 | Method and apparatus for preventing corrosion of contact A method for preventing corrosion of a contact, includes comparing a potential of a signal line connected to the contact with a predetermined potential corresponding to the corrosion of the contact; flowing a corrosion-prevention current into the contact when a resu... | 08/12/2008 |
| 7387713 | Resistored anode construction A sacrificial anode assembly operative to inhibit corrosion in the metal tank portion of a water heater includes a cylindrical metal anode member having an end retained within a tubular, electrically non-conductive plastic insulating sleeve which, in turn, is captiv... | 06/17/2008 |
| 7318889 | Apparatus, system and method for extending the life of sacrificial anodes on cathodic protection systems An apparatus, system, method and computer program product directed to controlling corrosion of a conductive structure in contact with a corrosive environment and electrically connected to one or more anodes, wherein the anodes are less noble than the conductive stru... | 01/15/2008 |
| 7264697 | Marine anode with current tester A sacrificial marine anode with a water proof encased current tester to alert an operator of proper connectivity, current status of the cathodic protection system for an associated marine structure, and status of current tester power supply is disclosed. ... | 09/04/2007 |
| 7198706 | Method for inhibiting corrosion of metal The present invention generally provides a method for prevention of corrosion in a metal object by inducing a surface current over the entire surface of the metal object. The surface current can be induced by direct or indirect application of electrical waveforms ha... | 04/03/2007 |
| 7189319 | Axial current meter for in-situ continuous monitoring of corrosion and cathodic protection current First and second axial current meters (ACM) are mechanically connected to a well casing just above and below a corrosive zone and a master axial current meter (MACM) is connected to the casing at the earth's surface, the MACM periodically obtaining measurements of a... | 03/13/2007 |
| 7186321 | Cathodic protection system for metallic structures An active cathodic protection system, the apparatus comprising a rectifier element with at least one electrical connection to a source of electrical current, the rectifier element associated with a direct current positive (+) output terminal for electrical connectio... | 03/06/2007 |
| 7162150 | Thermistor sensor probe with bimetal high limit control for electric water heater control A bracket operable to support a temperature control device and a sensor probe at an external surface of a water tank for controlling and monitoring the water temperature of the tank. The bracket comprises a first receptacle, a second receptacle, and a coupling featu... | 01/09/2007 |
| 7081187 | Internal cathodic protection system A cathodic protection system for internal surfaces of a pipeline is provided which includes a flexible anode assembly having a first and a second end and having at least one flexible anode wire having a first end and a second end. First and second removable pressure... | 07/25/2006 |
| 7029569 | Semiconductive corrosion and fouling control apparatus, system, and method An apparatus, system, method and computer program product directed to controlling corrosion of a conductive structure in contact with a corrosive environment and coated with a semiconductive coating, where the corrosion is controlled by a controllable filter and a c... | 04/18/2006 |
| 6998031 | Electrode An electrode comprises an elongate hollow tube made of porous titanium suboxide the inside wall of which is contacted at spaced apart locations by an electrical conductor so that the current is substantially uniformly distributed along the length of the electrode. | 02/14/2006 |
| 6993395 | Skin-applied electrode pads Electrodes are provided, for example including: (a) a first electrode component including a conductive skin-contacting element, and (b) a second electrode component including a thin electrical conductor. The first and second electrode components may be positioned du... | 01/31/2006 |
| 6841059 | Hull potential monitor device having a plurality of annunciators A monitor for use in conjunction with a galvanic protection system for a marine vessel provides automatic and continuous monitoring of a voltage at a reference electrode of the galvanic protection system and displays the results continuously by energizing one or mor... | 01/11/2005 |
| 6835291 | Anode monitoring and subsea pipeline power transmission An anode monitoring system for monitoring the integrity of anodes 2 provided on a metallic structure such as a pipeline system 1. A signal circuit Sn including the pipeline 1 and one of the anodes 2 is set up and appropriate si... | 12/28/2004 |
| 6811681 | Semiconductive corrosion and fouling control apparatus, system, and method An apparatus, system, method and computer program product directed to controlling corrosion of a conductive structure in contact with a corrosive environment and coated with a semiconductive coating, where the corrosion is controlled by a controllable filter and a c... | 11/02/2004 |
| RE38581 | Pulsed cathodic protection system and method A cathodic protection system for protecting buried conducting structures, subject to corrosion such as well casings, pipe lines and the like, utilizes a plurality of pulsed D.C. current sources with the negative output terminal of each source connected to a separate... | 09/14/2004 |
| 6506295 | Cathodic protection method and device for metal structure A main anode and a pilot anode are mounted on a coating film of a metal structure, a cathode is mounted on a metal based material of the metal structure, a predetermined voltage is applied from the pilot anode to the metal structure, a magnitude of corros... | 01/14/2003 |
| 6478948 | Method of monitoring and controlling corrosion of furnace boiler tubes A method for monitoring and reducing corrosion in furnace boiler tubes measures electrochemical noise associated with corrosion mechanisms while corrosion is occurring at the surface of the tubes as they are exposed to combustion products. This noise is d... | 11/12/2002 |
| 6423208 | Method and apparatus for lead contamination control Control of lead contamination in residential water supplies is accomplished by cathodic protection of lead-containing piping and lead-containing fixtures. Specifically, a partially insulated wire is inserted into lead-containing service lateral piping. Ap... | 07/23/2002 |
| 6361664 | Method of reducing corrosion with electrical charge A vehicle system component is provided with an electrical charge to resist corrosion. Preferably, the electrical charge is generated by movement of components adjacent to the suspension component. Friction surfaces may be placed in contact with each other... | 03/26/2002 |
| 6331243 | Process and apparatus for preventing oxidation of metal An apparatus for prevention of corrosion in metal objects uses a capacitively coupled fastener or pad attached to a metal body being protected from corrosion. The metal body and the negative terminal of a source of DC voltage (battery) are grounded. The p... | 12/18/2001 |
| 6261439 | Cathodic protection system for mitigating stray electric current effects A cathodic protection system utilizes dynamic control of an output from a power supply to vary an impressed current applied to a structure to be protected proportional to a measurement of stray electrical current. The current is also supplied to an anode ... | 07/17/2001 |
| 6224742 | Pulsed cathodic protection system and method A cathodic protection system for protecting buried conducting structures, subject to corrosion such as well casings, pipe lines and the like, utilizes a plurality of pulsed D.C. current sources with the negative output terminal of each source connected to... | 05/01/2001 |
| 6183625 | Marine galvanic protection monitor A galvanic monitor system uses two annunciators, such like light emitting diodes, to alert a boat operator of the current status of the boat's galvanic protection system. A reference electrode is used to monitor the voltage potential at a location in the ... | 02/06/2001 |
| 6103097 | Method and apparatus for lead contamination control Control of lead contamination in residential water supplies is accomplished by cathodic protection of lead-containing piping and lead-containing fixtures. Specifically, a partially insulated wire is inserted into lead-containing service lateral piping. Ap... | 08/15/2000 |
| 6019877 | Protecting medical electrodes from corrosion A medical electrode assembly includes an electrically conductive electrode, an electrically conductive sacrificial element, and a layer of electrically conductive gel. The electrode has an electrical terminal to connect with external electrical circuitry.... | 02/01/2000 |
| 5954938 | Simplified cathodic corrosion protection method and apparatus for metal structure Mounting an anode on a coated surface of a metal structure exposed to the atmosphere; connecting a cathode to a main body of the metal structure; connecting the anode and the cathode to a solar battery; whereby when a defective part is generated on the co... | 09/21/1999 |
| 5627414 | Automatic marine cathodic protection system using galvanic anodes An automatic system uses sacrificial galvanic anodes to to provide a controlled and optimum amount of cathodic protection against galvanic corrosion on submerged metal parts. Intermittently pulsed control circuitry enables an electro-mechanical servo syst... | 05/06/1997 |
| 5475902 | Burial casket incorporating cathodic protection A cathodic protection system for a burial casket comprises a sacrificial anode rod, nylon sleeves encircling the rod and metal straps positively positioned relative the sleeves and welded to the casket bottom. One of the sleeves encircles the resistor of ... | 12/19/1995 |
| 5335311 | Modular galvanic current control resistor assembly for mounting on an electric immersion heater A modular galvanic current control resistor assembly for application to a metallic sheathed heating element of a domestic water heating tank to prevent heating element corrosion includes a circular metallic disc adapted to fit over the sheath ends of a U-... | 08/02/1994 |
| 5334299 | Water heater having improved sacrificial anode assembly therein A water heater includes a metal storage tank for holding a quantity of water to be heated. Extending into the interior of the tank is a sacrificial anode assembly operative to inhibit corrosion of the tank and including a cylindrical metal anode member ha... | 08/02/1994 |
| 5256267 | Resistored sacrificial anode assembly for metal tank A sacrificial anode assembly is insertable into a metal water storage tank to inhibit corrosion thereof and includes a cylindrical metal anode member having an end retained within a cylindrical plastic insulating sleeve which, in turn, is captively retain... | 10/26/1993 |
| 5023928 | Apparatus for reducing the current drain on the sacrificial anode in a water heater The sacrificial anode in an electrically-heated water heater is protected against excessive current drain and premature dissolution resulting from the cathodic effect of the metal jacket on the heating element by a protective device which provides an effe... | 06/11/1991 |
| 4848616 | Electric immersion heating unit with readily removable and replaceable galvanic current control resistor An electric immersion heating unit for use in conjunction with a metallic water heater tank provided with a sacrificial anode has the legs of a U-shaped metallic sheathed heating element extending in electrically insulated relationship through a metallic ... | 07/18/1989 |
| 4786383 | Cathodic protection system for a water heater tank A cathodic protection system for a water heater tank incorporating a resistor anode assembly. The steel water heater tank is provided with an opening and an internally threaded spud is secured to the outer surface of the tank bordering the opening. An ano... | 11/22/1988 |
| 4370211 | Method and apparatus for cathodic protection Apparatus comprises an anode made of a sacrificial anode metal and at least one member made of a material other than the material of the sacrificial anode metal. A method for determining the state of corrosion of an anode is also provided.... | 01/25/1983 |
| 4152228 | Method for reducing electrolytic interference with metal structures A parallel galvano-electrolytic current path is provided to conduct a current comprising (i) a portion of the interfering current and (ii) currents arising due to varying degrees of polarization of metal surfaces. The current is measured and a variable re... | 05/01/1979 |
