ARMCO STEEL COMPANY, L.P., A DE LIMITED PARTNERSHIP

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C21D MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS 342
 
  
 
C22C ALLOYS 270
 
  
 
C23D ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS 13

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5137584 Niobium carbide strengthened steel for porcelain enamelingJul 05, 91Aug 11, 92[C21D, C23D]
5123971 Cold reduced non-aging deep drawing steel and method for producingJun 25, 91Jun 23, 92[C21D, C22C]
5102472 Cold reduced non-aging deep drawing steel and method for producingApr 23, 91Apr 07, 92[C21D, C22C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5248528 Thermoplastic acrylic coated steel sheetExpiredJul 22, 92Sep 28, 93[B05D]
5175502 Method and apparatus for determining acid concentrationExpiredSep 14, 90Dec 29, 92[G01N]
5151297 Thermoplastic acrylic coated steel sheetExpiredMar 26, 90Sep 29, 92[B05D]
5116645 Hot dip aluminum coated chromium alloy steelExpiredAug 27, 90May 26, 92[C23C]
5106467 Alkaline leaching of galvanized steel scrapExpiredOct 05, 90Apr 21, 92[C25C]
5103683 Rotary drum sampling deviceExpiredJan 09, 91Apr 14, 92[G01N]
5023113 Hot dip aluminum coated chromium alloy steelExpiredAug 29, 88Jun 11, 91[C23C]
5023427 Method and apparatus for automatically aligning proximal edges of sheets to be butt weldedExpiredApr 12, 90Jun 11, 91[B23K]
5015341 Induction galvannealed electroplated steel stripExpiredAug 05, 88May 14, 91[C25D]
4874428 Fluidizing a lime-silica slagExpiredSep 12, 88Oct 17, 89[C21C]
4814054 Apparatus for producing one-side electroplated steel strip with enhanced phosphatabilityExpiredSep 30, 88Mar 21, 89[C25D]
4808278 Method and apparatus for producing one-side electroplated steel strip with enhanced phosphatabilityExpiredJan 15, 88Feb 28, 89[C25D]
4790686 Protected metal articleExpiredOct 05, 87Dec 13, 88[E01F]
4719129 Multiple nozzle jet finishingExpiredFeb 09, 87Jan 12, 88[B05D]
4716075 Protected metal article and method of makingExpiredApr 10, 86Dec 29, 87[D21H, D21F, B32B]
4600434 Process for desulfurization of ferrous metal meltsExpiredJul 24, 85Jul 15, 86[C21C]
4591395 Method of heat treating low carbon steel stripExpiredDec 20, 84May 27, 86[C21D]
4579164 Process for making cast ironExpiredOct 06, 83Apr 01, 86[B22D, C22C]
4557952 Process for controlling zinc vapor in a finishing process for a hot dip zinc based coating on a ferrous base metal stripExpiredJul 30, 84Dec 10, 85[B05D]
4557953 Process for controlling snout zinc vapor in a hot dip zinc based coating on a ferrous base metal stripExpiredJul 30, 84Dec 10, 85[C23C]

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