HYDROCHEM INDUSTRIAL SERVICES, INC.

Patent Owner

Watch Compare Add to Portfolio

Stats

Details

Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133

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
RE35815 Method for treating waste materialAug 26, 94Jun 02, 98[B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6118000 Methods for preparing quaternary ammonium saltsExpiredFeb 17, 99Sep 12, 00[C07D]
5991968 High pressure cleaning and removal systemExpiredJul 11, 97Nov 30, 99[A47L]
5970574 Apparatus and method for cleaning surfaces by removing and containing wasteExpiredApr 24, 97Oct 26, 99[A47L]
5640982 Tank cleaning system using collapsible robotic tank entry vehicleExpiredNov 18, 94Jun 24, 97[B08B]
5561883 Tank cleaning system using remotely controlled robotic vehicleExpiredSep 15, 94Oct 08, 96[B08B]
5529637 Formic-carboxylic acid mixtures for removing iron oxide sclae from steel surfacesExpiredFeb 17, 95Jun 25, 96[B08B, C23G]
5462671 Method of removing heavy metals from solutions of amino-carboxylic acids for disposal purposesExpiredSep 08, 94Oct 31, 95[C02F]
5419183 Methods and apparatus using a hydrocarbon gel to isolate mainline valves in a pipeline during a hydrotestExpiredJun 18, 93May 30, 95[G01M]
5339846 Line mole trapExpiredOct 30, 92Aug 23, 94[F16L, B08B]
5323686 Tube jetting apparatusExpiredMar 22, 93Jun 28, 94[F16K]
5217167 Tube jetting apparatusExpiredJan 17, 92Jun 08, 93[B05B]
5197324 Methods and apparatus using a gel to isolate mainline valves in a pipeline during a hydrotestExpiredFeb 12, 92Mar 30, 93[G01M]
5180500 Chemical removal of thiourea from hydrochloric acidExpiredApr 04, 89Jan 19, 93[C02F]
5160631 Method for treating chelant solutions to remove metals in solutionExpiredAug 05, 91Nov 03, 92[C02F]
5154198 Tube jetting apparatusExpiredSep 01, 88Oct 13, 92[B08B]
5127961 Method and apparatus for forming a frothed fluid slug for pipe cleaningExpiredDec 14, 90Jul 07, 92[B08B]
5107873 Chamber cleaning apparatus and methodExpiredAug 08, 89Apr 28, 92[B08B]
5090205 Methods and apparatus for periodic chemical cleanings of turbinesExpiredMar 11, 91Feb 25, 92[F01K]
4971775 Process for removal of nickel from effluent containing EDTAExpiredJun 30, 87Nov 20, 90[C01G]
4861386 Enhanced cleaning procedure for copper alloy equipmentExpiredNov 09, 88Aug 29, 89[B08B]

View all patents..

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!.