ENVIRONMENTAL TECHNOLOGIES GROUP, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 3131
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 3125
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 2204

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5587581 Method and an apparatus for an air sample analysisJul 31, 95Dec 24, 96[H01J, B01D]
5554846 Apparatus and a method for detecting alarm molecules in an air sampleJul 31, 95Sep 10, 96[H01J]
5283199 Chlorine dioxide monitor based on ion mobility spectrometry with selective dopant chemistryOct 18, 91Feb 01, 94[G01N, B01D]
5234838 Ammonia monitor based on ion mobility spectrometry with selective dopant chemistryAug 16, 91Aug 10, 93[G01N]
5095206 Method and apparatus for improving the specificity of an ion mobility spectrometer utillizing sulfur dioxide dopant chemistryApr 17, 91Mar 10, 92[H01J, B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5830344 Disposable sensor for metal analysis and method of using sameExpiredJul 10, 96Nov 03, 98[G01N]
5554268 Disposable sensor for metal analysisExpiredFeb 22, 95Sep 10, 96[G01N]
5338931 Photoionization ion mobility spectrometerExpiredApr 23, 92Aug 16, 94[H01J, B01D]
5083019 Preconcentrator for ion mobility spectrometerExpiredAug 21, 90Jan 21, 92[H01J, B01D]
5053343 Selective ionization of gas constituents using electrolytic reactionsExpiredMar 06, 89Oct 01, 91[G01N]
5032721 Acid gas monitor based on ion mobility spectrometryExpiredJun 01, 90Jul 16, 91[H01J]
5021654 All ceramic ion mobility spectrometer cellExpiredApr 28, 89Jun 04, 91[H01J]
4950893 Method and apparatus for enhanced ion spectra generation and detection in ion mobility spectrometryExpiredApr 27, 89Aug 21, 90[H01J]
4933285 Multiple monolayers of polymeric linkages on a solid phase for immobilizing macromoleculesExpiredDec 21, 88Jun 12, 90[C12N, G01N, C07K]
4928033 Thermionic ionization sourceExpiredNov 15, 88May 22, 90[H01J]
4861882 Ethynyl terminated imidothioethers and resins therefromExpiredJul 14, 88Aug 29, 89[C08G]
4855595 Electric field control in ion mobility spectrometryExpiredJul 03, 86Aug 08, 89[H01J]
4839143 Selective ionization of gas constituents using electrolytic reactionsExpiredFeb 15, 85Jun 13, 89[G01N]
4797554 Ion mobility spectrometerExpiredDec 24, 87Jan 10, 89[H01J]
4744954 Amperometric gas sensor containing a solid electrolyteExpiredJul 11, 86May 17, 88[G01N]
4735691 Method for operating electrochemical detector cellExpiredDec 23, 85Apr 05, 88[G01N]
4712008 Ion mobility spectrometerExpiredSep 18, 86Dec 08, 87[H01J]
4709238 Sequential mono-lobe trackerExpiredApr 27, 84Nov 24, 87[G01S]
4599609 Personal liquid chemical agent detectorExpiredDec 05, 84Jul 08, 86[G08B]
4597299 Ion gate sample gas inlet control for gas chromatograph analyzerExpiredMar 06, 85Jul 01, 86[G01N]

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