CORRPRO COMPANIES INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C23F NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES 531
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 3203
 
  
 
C22C ALLOYS 171
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL169

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6673309 Sacrificial anode for cathodic protection and alloy thereforFeb 10, 95Jan 06, 04[C22C]
6315876 Cathodic protection systemApr 26, 94Nov 13, 01[G01N, C23F]
6238545 Composite anode, electrolyte pipe section, and method of making and forming a pipeline, and applying cathodic protection to the pipelineAug 02, 99May 29, 01[C23F]
6187161 Reference cellApr 27, 92Feb 13, 01[G01N, C23F]
5370783 ElectrodeAug 01, 91Dec 06, 94[G01N, C23F]
5340455 Cathodic protection system for above-ground storage tank bottoms and method of installingJan 22, 93Aug 23, 94[C23F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5932087 Submersible anode and methodExpiredDec 30, 97Aug 03, 99[C23F]
5902463 Submersible anode and methodExpiredDec 30, 97May 11, 99[C23F]
5885427 Cast iron anode and method of makingExpiredJun 12, 97Mar 23, 99[C25B]
5411646 Cathodic protection anode and systemsExpiredMay 03, 93May 02, 95[C23F]
5216370 Method and system for measuring the polarized potential of a cathodically protected structures substantially IR drop freeExpiredOct 24, 91Jun 01, 93[G01N]
5141607 Method and apparatus for the removal of chlorides from steel reinforced concrete structuresExpiredJul 31, 90Aug 25, 92[C23F]
4798657 Cathodic protection systemExpiredJan 20, 87Jan 17, 89[C23F]
4778949 Wire entrance fittingExpiredJan 23, 87Oct 18, 88[H01R, H01B]
4710644 Replaceable deep anode systemExpiredOct 30, 85Dec 01, 87[C23F]
4515669 Anode and connectionExpiredOct 06, 83May 07, 85[C23F]
4388594 Semi-permeable electrolytic cell and method for surveying buried structuresExpiredJun 09, 80Jun 14, 83[G01N, G01R, G01V]
4383900 Apparatus and method for measuring the IR drop free cathodic protection potential created by a rectifier and controlling rectifier operation to achieve a desired level thereofExpiredApr 09, 81May 17, 83[C23F]
4365191 Method and apparatus for electrical surveys of offshore metal structures with correction for distanceExpiredFeb 29, 80Dec 21, 82[G01R, G01V]
4322805 Electrical survey method and apparatusExpiredMar 05, 79Mar 30, 82[G01R, G01V]
4279729 Anode and method of constructionExpiredApr 14, 80Jul 21, 81[C25B, H01R, C23F]
4255241 Cathodic protection apparatus and method for steel reinforced concrete structuresExpiredMay 10, 79Mar 10, 81[C23F]

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