Portals Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21H PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR 137

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5405500 Method for making sheet materials and security paperMay 05, 93Apr 11, 95[D21H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6063239 Security paperExpiredJun 29, 98May 16, 00[D21H, D21F]
5928471 Security features for paperExpiredMar 20, 96Jul 27, 99[D21H]
5868902 Security paperExpiredSep 10, 97Feb 09, 99[D21H]
5678863 High value documentsExpiredJan 23, 95Oct 21, 97[B42D]
5631039 Security thread, a film and a method of manufacture of a security threadExpiredAug 12, 94May 20, 97[B41M, B05D]
5388862 Security articlesExpiredMay 19, 93Feb 14, 95[D21H]
5093184 Security paper with metallic patterned elongated security elementExpiredMay 29, 90Mar 03, 92[B42D]
4943093 Security paper for bank notes and the likeExpiredNov 14, 88Jul 24, 90[G09F, B42D]
4462866 Sheet materialsExpiredFeb 18, 82Jul 31, 84[D21D]
4462867 Paper incorporating a partially embedded stripExpiredJul 12, 82Jul 31, 84[D21D]
4183989 Security papersExpiredNov 29, 77Jan 15, 80[B41M, B44F]

Top Inventors for This Owner

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