Hoffman Environmental Systems, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 1124
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
B65B MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING 163
 
  
 
B65D CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES 197
 
  
 
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR127
 
  
 
D21F PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON128

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6099674 Laminated package and method of producing the sameDec 03, 98Aug 08, 00[B29C, B32B, B65B]
5882746 Laminated package and method of producing the sameDec 28, 95Mar 16, 99[B65D]
5762758 Method of papermaking having zero liquid dischargeMay 28, 96Jun 09, 98[D21F, D21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6228215 Method for countercurrent treatment of slurriesExpiredApr 06, 98May 08, 01[D21C]
6071380 Method of papermaking having zero liquid dischargeExpiredMar 09, 98Jun 06, 00[D21F, D21C]
5753074 Method of washing a thin mat of cellulosic pulpExpiredAug 21, 96May 19, 98[D21C]
5643413 Multi-ply paper product and method of making the sameExpiredJun 13, 96Jul 01, 97[D21H]
5599426 Method of washing pulp using a single endless support fabricExpiredOct 11, 94Feb 04, 97[D21C]
5417809 Water reuse system incorporating vacuum pump sealing water in a zero discharge processExpiredAug 31, 94May 23, 95[D21F]

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