GESTRA AKTIENGESELLSCHAFT

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16T STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS, STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS44
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 257
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 2204
 
  
 
G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES 120
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 193
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 193
 
  
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 176

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8132589 Regulating valve for the discharge of liquidApr 11, 07Mar 13, 12[F16T]
6507468 Controller for heat engineering installationsJun 27, 00Jan 14, 03[H01H, H02H]
6404209 Measuring instrument for fill level sensorsJun 20, 00Jun 11, 02[G01R]
6158664 Bimetallic steam trapJul 20, 99Dec 12, 00[F16T]
6148845 Valve housing with a connecting part and a capMar 23, 99Nov 21, 00[F16T]
5798698 Method of monitoring the level of a liquid in a containerFeb 20, 96Aug 25, 98[G08B]
5719342 Probe with unilaterally cantilevered head housingOct 08, 96Feb 17, 98[G01N]
5669263 Probe for monitoring liquid with protection against leakageFeb 15, 96Sep 23, 97[G01F]
5457640 Method of checking condensate dischargersJan 31, 94Oct 10, 95[G01H]
5272921 Probe for monitoring liquidMar 05, 93Dec 28, 93[G01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0307,882 Capacitive Level ProbeAbandonedJun 02, 06Dec 18, 08[G01F]
4995553 Thermally controlled valveExpiredSep 07, 89Feb 26, 91[G05D, F16T]
4955536 Thermally controlled valveExpiredSep 07, 89Sep 11, 90[G05D, F16T]
4607661 Check valueExpiredApr 22, 85Aug 26, 86[F16K]
4598861 Bimetallically controlled steam trapExpiredAug 01, 85Jul 08, 86[F16T]
4586653 Discharge device for a condensate controlled by a bimetallic snap discExpiredMar 17, 83May 06, 86[F16T]
4475569 Float controlled condensate discharge deviceExpiredApr 18, 83Oct 09, 84[F17T]
4347975 Bimetallic-controlled steam trapExpiredNov 24, 80Sep 07, 82[F16T]
4339075 Bimetallic-controlled steam trapExpiredJan 16, 81Jul 13, 82[F16T]
4321944 Check valveExpiredOct 14, 80Mar 30, 82[F16K]
4311272 Bimetallic controlled steam trapExpiredAug 07, 80Jan 19, 82[F16T]

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