PVI Industries, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F22B METHODS OF STEAM GENERATION; STEAM BOILERS 518
 
  
 
F23N REGULATING OR CONTROLLING COMBUSTION 318
 
  
 
F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL 324
 
  
 
F23C METHODS OR APPARATUS FOR COMBUSTION USING FLUENT FUEL 120
 
  
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 183
 
  
 
G06F ELECTRIC DIGITAL DATA PROCESSING 1446

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5775268 High efficiency vertical tube water heater apparatusApr 24, 96Jul 07, 98[F22B]
5772422 Burner array for water heating apparatusAug 27, 96Jun 30, 98[F24H, F22B]
5713515 Method and system in a fluid heating apparatus for efficiently controlling combustionDec 05, 95Feb 03, 98[F23N, G05D]
5666943 Water heater or boiler with improved tank designNov 02, 95Sep 16, 97[F24H]
5666944 Water heating apparatus with passive flue gas recirculationSep 05, 95Sep 16, 97[F23C]
5515269 Method of producing a bill of material for a configured productNov 08, 93May 07, 96[G06F]
5479913 Direct contact water heaterJan 31, 95Jan 02, 96[F24H]
5437249 Combination burner and flue gas collector for water heaters and boilersOct 27, 93Aug 01, 95[F22B]
5400962 System and method for reduced purge operation of a forced draft burner in a water heaterOct 27, 93Mar 28, 95[F23N, F22B]
5395230 High ratio modulation combustion system and method of operationJul 26, 93Mar 07, 95[F23N]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6044803 Vertical tube water heater apparatusExpiredJan 16, 97Apr 04, 00[F22B]
4981112 Potable hot water storage vessel and method of manufactureExpiredDec 06, 89Jan 01, 91[F22B]
4968066 Bolt-on flangeExpiredJul 27, 89Nov 06, 90[F16L]
4938204 Water heater or boiler with improved thermal efficiencyExpiredAug 18, 89Jul 03, 90[F24H]
4936260 Boiler or water heater with insulated water tankExpiredJan 17, 89Jun 26, 90[F22B]
4869208 Compact modular fluid storage and heating systemExpiredSep 30, 86Sep 26, 89[F22B]
4545329 Water heaterExpiredAug 13, 84Oct 08, 85[F22B]
4465024 Water heaterExpiredSep 23, 83Aug 14, 84[F22B]
4254826 Modular heat exchangerExpiredSep 11, 79Mar 10, 81[F28D, F28F]
4204573 Heat exchanger with concentric flow tubesExpiredMay 09, 77May 27, 80[F28D]

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