US2947680A - Multiple disc anode - Google Patents

Multiple disc anode Download PDF

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Publication number
US2947680A
US2947680A US700239A US70023957A US2947680A US 2947680 A US2947680 A US 2947680A US 700239 A US700239 A US 700239A US 70023957 A US70023957 A US 70023957A US 2947680 A US2947680 A US 2947680A
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United States
Prior art keywords
core
anode
discs
threaded
disc
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Expired - Lifetime
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US700239A
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English (en)
Inventor
Herman S Preiser
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Individual
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Individual
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Priority to BE571823D priority Critical patent/BE571823A/xx
Application filed by Individual filed Critical Individual
Priority to US700239A priority patent/US2947680A/en
Priority to GB23577/58A priority patent/GB891397A/en
Priority to FR1204136D priority patent/FR1204136A/fr
Application granted granted Critical
Publication of US2947680A publication Critical patent/US2947680A/en
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/18—Means for supporting electrodes
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/556—Section threaded to member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/55—Member ends joined by inserted section
    • Y10T403/559—Fluted or splined section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7047—Radially interposed shim or bushing
    • Y10T403/7051—Wedging or camming
    • Y10T403/7052—Engaged by axial movement

Definitions

  • This invention relates to cathodic protection of metals subjected to sea water against electrolytic corrosion and particularly to sacrificial anodes for such protection.
  • this invention relates to the provision of anodes of segmented construction which can be assembled into any desired length to provide sacrificial anodic material, such as zinc, in suiiicient quantity for cathodic protection for heat exchangers and associated equipment aboard ships or the like:
  • Zinc or other sacrificial anodes are installed on the seawater side of heat exchangers to protect waterboxes and tube ends against electrolytic corrosion.
  • the zinc is coupled to other less active metals, the metals are rendered electrically passive, and therefore their corrosion tendency issuppressed.
  • the zincs are naturally dissipated in service and must be replaced at regular intervals. Sometimes zincs arereplaced in certain equipment as often as once a month, but the average life is three months.
  • Zinc anodes cannot work properly as corrosion protection devices unless they are correctly mounted in the equipment to be protected. They must have adequate mechanical attachment and watertight electrical connections. Replacement of zincs aboard ship every three months is greatly simplified when the improved method of the instant invention is used.
  • This scheme enabled suitable lengths of rod to be cut from rod stock with a pipe cutter and threaded with the standard tapered pipe threads; all operations done manually, with the tapered thread eliminating the need of machining a shoulder stop in the old type bar stock.
  • Another typeof anode is that described in'United States Patent No, 2,609,340.
  • This patented anode is a segmented construction made up of circular discs, somewhat similar to the one disclosed in the instant. invention, except that each disc of the prior art patent has an axially centered and fixed core of metal tubing slightly protruding on each flat side ofthe anode disc. These discs are assembled on a partially threaded rod which is tightened into a tapped hole of a support plug.
  • the main deficiency in the solid type anode rod is the necessity of cutting them to a given size from a stock length since, the lengths used in different equipment varies in a random fashion. This means that the labor cost of installing such anode rods is excessive and many times the cost of the material used.
  • the solid type cylindrical rod has the deficiency of necking down at areas in close proximity to the metal parts under cathodic protection. Sometimes this necking down causes the anode rod to break in two before being completely expended. This reduces the useful life of the anode and in some cases endangers rotating equipment by having the anode chunk fall or be carried into the operating parts of such equipment.
  • Patent No. 2,609,340 overcame the two objections of the solid pencil anodes in that an adjustable anode was feasible in which a cathodic metal core support was included. But, in accomplishing this end, a plurality of added parts are necessary, namely, the anode discs, a threaded connecting rod with a swaged flattened end, a wing nut, and a pair of sealing washers. Further, with the patented anode, manual labor and tools are required to cut the connecting rod to the desired length in order to assemble a given length of anode discs.
  • Another object is to provide an anode disc with an improved core construction.
  • a further object is to provide an anode disc incorporating a unique core construction that afiords ready assembly of a plurality of such discs into a unitary anode without the need of special tools or skilled labor.
  • a further object of the invention is to provide a multiple disc anode assembly wherein mechanical rigidity, electrical continuity and tightness under vibration is assured.
  • discs are each provided with a special fitting or core made of cathodic material and formed with a threaded, axial male tip at one end and a threaded, axial female recess at the other end and which fitting or core is secured axially in an anode segment.
  • the outside cylindrical surface of this cathodic metal fitting or core is roughened, knurled, recessed or fluted so as to aid in gripping the anodic material cast or molded around it, while, at the same time, forming good electrical contact between the cathodic material of the core and theanodic material of the sleeve.
  • This segmented assembly permits as many discs to be assembled as desired, simply by threading the male end of one disc into the female of another.
  • the first segment of the anode can be screwed directly into a threaded tapped hole of the support plug.
  • the mating of the members of each anode segment is made by close fitting threads or other locking devices so that mechanical rigidity, electrical continuity and tightness under vibration is assured.
  • the anode is assembled on the job to the desired length and is attached to a suitable threaded support plug. The plug is then screwed into an appropriatebossing 0n the heat exchanger bonnet, pump casing, or the like,. to
  • the anode can be assembled to any length on the-job; it contains an axially centered support core of cathodic metal; contains only the required number of discs in addition to the support plug, all firmly locked together; removes the necessity of a threaded connecting rod, nut and washer; and requires no special cutting and fitting for assembly.
  • the anode segments can be tightened in place by hand or, at most, with a pipe wrench.
  • the discs can be stocked in the required diameters and will replace all other solid pencil and multiple disc assemblies used in the Navy up to now. The cost of such an anode is appreciably less than any of the present schemes available.
  • Fig.1 is a side elevation of an assembled, multiple disc anode incorporating a preferred embodiment of the invention
  • Fig. 2 is a top plan of the disc shown in Fig. 3;
  • Fig. 3 is an enlarged side elevation, partially in axial section, of one of the discs shown in Fig. 1.
  • a base plug formed of brass or other cathodic material.
  • the base plug 10 has a hexagonal head portion 14. and a body portion having external pipe threads 12 and an internal axial bore 15.
  • the pipe threads 12 permit the base plug to be secured in a correspondingly threaded opening of a wall of a heatexchanger or other vessel.
  • the axial bore 15 is threaded to receive the male end of the first of a plurality of anode segments 16, hereinafter referred to as anode or cathodic protector discs.
  • each of the anode discs 16 is of unitary construction with no relatively movable parts, and com.- prises a cylindrical core 18' formed preferably of steel or like cathodic metal and provided with a threaded axial stem or male member 20 at one end and with a threaded axial bore or female portion 22; at the opposite end.
  • the arrangement, as described hereinafter, and as shown in Fig. 1 is that in assembling the discs, the male; end of one disc is threaded into the female of another. The spacing of the discs is somewhat exaggerated in Fig. 1.
  • the cylindrical outer surface of the core is roughened, knurled, recessed or fluted, as at 24, so as to aid in gripping and bonding the anodic material 26 cast or molded thereto.
  • the anode material is preferably zinc, although magnesium or other suitable sacrificial anodic material may be used.
  • the anode material is placed on the steel core in a manner as to provide a projecting shoulder 28 exposed at the male end of the core and a slight projection or shoulder 30 at the female end.
  • the otherwise flat surfaces of the shoulders are knurled, serrated or ratcheted, as at 32 and 34, for gripping contact of the shoulder of one disc with the shoulder of an adjacent disc, as described hereinafter.
  • the ratchets 32 and 34' are exaggerated in the drawing.
  • the base plug 10 having been threaded externally as ati12 and formed with the threaded bore 15, is screw threaded onto the male end 20 of an anode disc 16, the disc, having been prefabricated as described hereinbefore. Then the male-end of a second disc is threaded into the mating tapped bore of the first disc, at third disc is threaded ,into the second, and so on until the desired lengthiofkmultiple disc anode is attained for the job at hand.
  • the final assembly of the discs forms a line of discs, the discs being axially in substantially a straight line.
  • the cross-sectional shape of the anode discs is not critical and such shapes as polygonal, square, or triangular may be employed. However, it has been found in practice that a circular cross-section for both the core of cathodic material and the cylindrical sleeve of anodic material give excellent results.
  • the length of the disc, relative to its diameter is likewise not critical. This relationship depends somewhat on available space as does the number of discs contained in an assembled anode. In practice, a nominal number of discs of various sizes may be stocked for convenience.
  • a cathodic protection device for protecting'the interior surface of a vessel having an aperture in a wall thereof, said device comprising a plug adapted for closing the aperture in the vessel, said plug having a threaded axial recess formed in the inner end thereof, an elongated multiple disc assembly fixed to the innerJendJof said plug and adapted to extend within the vessel, said multiple disc assembly comprising a plurality of discs each having a cathodic core and a sacrificial anodic sleeve firmly bonded to the core, the core being longer than the'sleeve and each of the cathodic cores having a threaded axial stem projecting from one end thereof and a threaded axial recess formed in the opposite end thereof, the construction and arrangement of the cores being such that the threaded stem of a firstdisc is screwthreaded into the threaded recess-of the plug, the.
  • a cathodic protection device for protecting thesurface of a vessel against electrolytic corrosion,- saiddevice comprising a supporting member being provided with a means for securing the device to the vessel; a plurality of cathodic protector discs; each of said discs being of rigid unitary construction and comprising a central core of a cathodic metal and an outer sleeve of a sacrificial anodic metal around and firmly bonded to its core, with the core being longer than the sleeve, the core having an end projecting beyond the sleeve and the end comprising a stem, the other end of said core having a recess open at the corresponding end of the associated sleeve; said plurality of discs being axially fitted securely together to form a line of discs, with the stem of the core of a first disc fitting into the recess of the core of an adjacent disc along said line, and means locking the stern and recess together; said supporting member having a portion securely fitting an end of the core
  • a cathodic protection device for protecting a surface of a vessel against electrolytic corrosion, said device comprising a supporting member being provided with a means for securing the device to the vessel; a plurality of cathodic protector discs, each of said discs being of rigid unitary construction and comprising a central core of a cathodic metal and an outer sleeve of a sacrificial anodic metal around and firmly bonded to its core, the core being longer than the sleeve, the core having an end projecting beyond the sleeve and the end comprising a threaded stem, the other end of said core having a threaded recess open at the corresponding end of the associated sleeve; said plurality of discs being axially threaded together to form a line of discs, with the threaded stem of the core of a first disc screw-threaded into the threaded recess of: the core of an adjacent disc along said line; said supporting member having a threaded portion
  • a cathodic protection device for protecting a surface of a vessel against electrolytic corrosion, said device comprising a supporting member being provided with a means for securing the device to the vessel; a plurality of cathodic protector discs, each of said discs being of rigid unitary construction and comprising a central core of a cathodic metal and an outer sleeve of a sacrificial anodic metal around and firmly bonded to its core, the core being longer than the sleeve, the core having an end projecting beyond the sleeve and the end comprising a threaded stem, the other end of said core having a threaded recess open at the corresponding end of the associated sleeve; said plurality of discs being axially threaded together to form a line of discs, with the threaded stem of the core of a first disc screw-threaded into the threaded recess of the core of an adjacent disc along said line, said screw-threaded stem and recess
  • a unitary cathodic protector disc comprising a cathodic core, a sacrificial anodic sleeve firmly bonded to said core, the core being longer than the sleeve, said core having a first end projecting beyond a first end of said sleeve, the first core end comprising a threaded stem, the other end of said core comprising a threaded recess open at the other end of said sleeve.
  • a unitary cathodic protector disc comprising a cathodic core, a sacrificial anodic sleeve firmly bonded to said core, the core being longer than the sleeve, said core having a first end projecting beyond a first end of said sleeve, the first core end comprising a threaded stem, the other end of said core comprising a threaded recess open at the other end of said sleeve, an end of the core having a shoulder portion at and extending beyond the associated end of the sleeve.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Prevention Of Electric Corrosion (AREA)
US700239A 1957-12-02 1957-12-02 Multiple disc anode Expired - Lifetime US2947680A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE571823D BE571823A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1957-12-02
US700239A US2947680A (en) 1957-12-02 1957-12-02 Multiple disc anode
GB23577/58A GB891397A (en) 1957-12-02 1958-07-22 Improvements in or relating to devices for cathodic protection
FR1204136D FR1204136A (fr) 1957-12-02 1958-10-09 Anodes de protection à disques multiples

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US700239A US2947680A (en) 1957-12-02 1957-12-02 Multiple disc anode

Publications (1)

Publication Number Publication Date
US2947680A true US2947680A (en) 1960-08-02

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US700239A Expired - Lifetime US2947680A (en) 1957-12-02 1957-12-02 Multiple disc anode

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US (1) US2947680A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE571823A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1204136A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB891397A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133873A (en) * 1961-06-23 1964-05-19 Walter L Miller Electrolytic anode and connection
US3152059A (en) * 1960-05-24 1964-10-06 Cons Mining & Smelting Co Sacrificial zinc anode
JPS4937836A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-08-12 1974-04-08
US4413408A (en) * 1982-03-24 1983-11-08 Kerr-Mcgee Chemical Corporation Method for fabricating electrodes
US4544465A (en) * 1983-10-26 1985-10-01 Union Oil Company Of California Galvanic anodes for submergible ferrous metal structures
US4692231A (en) * 1985-02-06 1987-09-08 St Onge Henri S Apparatus for cathodic protection of metal piping
USD461173S1 (en) 2000-11-22 2002-08-06 Pgi International, Ltd. Thermowell
US20060035540A1 (en) * 2002-11-15 2006-02-16 Magnesium Elektron Limited Composite sacrificial anodes
AU2003200987B2 (en) * 2003-03-12 2008-07-24 Chian-Yin Tseng Direction adjustable device for an automobile with a steering linkage
US20120031750A1 (en) * 2010-08-04 2012-02-09 Omidreza Moghbeli Multipurpose Segmented Sacrificial Anode
US20130078034A1 (en) * 2011-09-27 2013-03-28 Konstantinos Kapelonis Building block
US20160115982A1 (en) * 2014-10-22 2016-04-28 Fang Yi Lin Building Block Structure
US11085183B2 (en) * 2013-01-11 2021-08-10 Atomic Design Inc. Display system
US20210269925A1 (en) * 2020-02-28 2021-09-02 Valmont Industries, Inc. System, method and apparatus for providing anodic corrosion protection for galvanized irrigation pipes
US11708638B1 (en) * 2020-06-24 2023-07-25 Howard Taitel Push fit anode plug and holder for sacrificial anodes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223658B (de) * 1962-05-19 1966-08-25 Siemens Ag Stabfoermige, aus Teilstuecken zusammengesetzte Elektrode, insbesondere fuer den kathodischen Schutz
CN116413197B (zh) * 2023-03-30 2024-07-19 北京市燃气集团有限责任公司 一种柔性阳极断点位置测试和确定方法及装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189914818A (en) * 1899-07-18 1900-07-07 John Ebenezer Bousfield Improvements in Means for Protecting Boilers, Pipes and the like from Corrosion.
US1008002A (en) * 1910-09-12 1911-11-07 Nat Carbon Co Carbon electrode.
US1547984A (en) * 1923-08-06 1925-07-28 Weber Walter Means of treating ammonium-chloride liquors in iron containers
US1709523A (en) * 1927-11-29 1929-04-16 Grasselli Chemical Co Anode
US2609340A (en) * 1949-02-21 1952-09-02 Robert E Mcmahon Corrosion inhibitor for heat exchangers and the like
US2666027A (en) * 1949-01-13 1954-01-12 Corrosion Control Company Anode for cathodic protecting systems
US2809932A (en) * 1955-06-21 1957-10-15 Allen Mfg Corp Anode for hot water tanks

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189914818A (en) * 1899-07-18 1900-07-07 John Ebenezer Bousfield Improvements in Means for Protecting Boilers, Pipes and the like from Corrosion.
US1008002A (en) * 1910-09-12 1911-11-07 Nat Carbon Co Carbon electrode.
US1547984A (en) * 1923-08-06 1925-07-28 Weber Walter Means of treating ammonium-chloride liquors in iron containers
US1709523A (en) * 1927-11-29 1929-04-16 Grasselli Chemical Co Anode
US2666027A (en) * 1949-01-13 1954-01-12 Corrosion Control Company Anode for cathodic protecting systems
US2609340A (en) * 1949-02-21 1952-09-02 Robert E Mcmahon Corrosion inhibitor for heat exchangers and the like
US2809932A (en) * 1955-06-21 1957-10-15 Allen Mfg Corp Anode for hot water tanks

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152059A (en) * 1960-05-24 1964-10-06 Cons Mining & Smelting Co Sacrificial zinc anode
US3133873A (en) * 1961-06-23 1964-05-19 Walter L Miller Electrolytic anode and connection
JPS4937836A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-08-12 1974-04-08
US4413408A (en) * 1982-03-24 1983-11-08 Kerr-Mcgee Chemical Corporation Method for fabricating electrodes
US4544465A (en) * 1983-10-26 1985-10-01 Union Oil Company Of California Galvanic anodes for submergible ferrous metal structures
US4692231A (en) * 1985-02-06 1987-09-08 St Onge Henri S Apparatus for cathodic protection of metal piping
USD461173S1 (en) 2000-11-22 2002-08-06 Pgi International, Ltd. Thermowell
USD468275S1 (en) 2000-11-22 2003-01-07 Pgi International, Ltd Thermowell
US20060035540A1 (en) * 2002-11-15 2006-02-16 Magnesium Elektron Limited Composite sacrificial anodes
US7374643B2 (en) 2002-11-15 2008-05-20 Magnesium Elektron Limited Composite sacrificial anodes
AU2003200987B2 (en) * 2003-03-12 2008-07-24 Chian-Yin Tseng Direction adjustable device for an automobile with a steering linkage
US20120031750A1 (en) * 2010-08-04 2012-02-09 Omidreza Moghbeli Multipurpose Segmented Sacrificial Anode
US8828195B2 (en) * 2010-08-04 2014-09-09 Omidreza Moghbeli Multipurpose segmented sacrificial anode
US20130078034A1 (en) * 2011-09-27 2013-03-28 Konstantinos Kapelonis Building block
US11085183B2 (en) * 2013-01-11 2021-08-10 Atomic Design Inc. Display system
US20160115982A1 (en) * 2014-10-22 2016-04-28 Fang Yi Lin Building Block Structure
US9695855B2 (en) * 2014-10-22 2017-07-04 Fang Yi Lin Building block structure
US20210269925A1 (en) * 2020-02-28 2021-09-02 Valmont Industries, Inc. System, method and apparatus for providing anodic corrosion protection for galvanized irrigation pipes
US12012659B2 (en) * 2020-02-28 2024-06-18 Valmont Industries, Inc. System, method and apparatus for providing anodic corrosion protection for galvanized irrigation pipes
US11708638B1 (en) * 2020-06-24 2023-07-25 Howard Taitel Push fit anode plug and holder for sacrificial anodes

Also Published As

Publication number Publication date
FR1204136A (fr) 1960-01-22
BE571823A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1900-01-01
GB891397A (en) 1962-03-14

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