HOUGHTON DURFERRIT GMBH

Patent Owner

Watch Compare Add to Portfolio

Stats

Details

Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C23C COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 596
 
  
 
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 243
 
  
 
C09D COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 191
 
  
 
C25B ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR 134

Top Patents (by citation)

Upgrade to the Professional Level to View Top Patents for this Owner. Learn More

Recent Publications

  • No Recent Publications to Display

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6964712 Hardening protection compositions for partial carburization of metallic componentsAug 07, 01Nov 15, 05[C23C, C09D]
6503344 Boronizing agent in paste formSep 24, 01Jan 07, 03[C23C]
6245162 Boriding agentJul 08, 99Jun 12, 01[C23C]
6159355 Process for the electrolytic production of cyanide in nitrocarburizing meltsJul 16, 99Dec 12, 00[C25B]
5735971 Method for the Pre-treatment of steel parts prior to salt bath nitridingNov 28, 95Apr 07, 98[C23C]
5527018 Filter unit and apparatus for desludging salt bathsNov 21, 94Jun 18, 96[C21D]
5453109 Method for the preparation of a hardening salt in piece form and productJul 13, 94Sep 26, 95[C21D]
5288340 Method of improving the corrosion resistance of carbonitrided components made of ferrous materialsAug 16, 91Feb 22, 94[C23C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5856501 Synthesis of thiazole derivativesExpiredDec 11, 97Jan 05, 99[C07D]
5846501 Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrateExpiredApr 11, 97Dec 08, 98[C22B]
5769906 Process for recovering the salt constituents from hardening-shop salt bathsExpiredSep 27, 96Jun 23, 98[C01F, C01D]
5102476 Process for nitrocarburizing components made from steelExpiredOct 01, 90Apr 07, 92[C23C]
4717429 Process for the removal of alkali metal nitrite from nitrate containing salt bathsExpiredAug 05, 86Jan 05, 88[C21D]
4509993 Regeneration agent for carburization salt bathExpiredDec 29, 83Apr 09, 85[C21D]
4441930 Process for removal of sand mold residues from cast partsExpiredDec 16, 80Apr 10, 84[C03C]
4292094 Process for increasing the corrosion resistance of nitrided structural parts made of iron materialExpiredAug 13, 80Sep 29, 81[C23F]

Top Inventors for This Owner

Upgrade to the Professional Level to View Top Inventors for this Owner. Learn More

We are sorry but your current selection exceeds the maximum number of comparisons () for this membership level. Upgrade to our Level for up to -1 comparisons!

We are sorry but your current selection exceeds the maximum number of portfolios (0) for this membership level. Upgrade to our Level for up to -1 portfolios!.