BURLINGTON NORTHERN RAILROAD COMPANY

Patent Owner

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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 144

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5209792 High-strength, damage-resistant railApr 07, 92May 11, 93[C21D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5584939 Method for cleaning rail carsExpiredJan 18, 94Dec 17, 96[B24C, B08B]
5481983 Magnetic sweeper apparatus and methodExpiredOct 27, 94Jan 09, 96[B61F]
5307744 Magnetic skirt product protection assembly for transporting on railroad carsExpiredSep 17, 92May 03, 94[B03B]
4944232 Dual-purpose depressed center railway flat carExpiredApr 25, 89Jul 31, 90[B61F, B60P]
4893717 Trailer hitch for use with a railroad carExpiredJan 27, 89Jan 16, 90[B61G]
D301112 Plug removal wrenchExpiredMar 24, 86May 16, 89[]
4707900 Cylinder liner sleeve pullerExpiredOct 09, 86Nov 24, 87[B23P]
4593536 Carbon dioxide refrigeration systemExpiredJun 21, 85Jun 10, 86[B60H]

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