The British Library Board

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4808433 Treatment of archival materialExpiredSep 12, 86Feb 28, 89[B05D]
4724158 Treatment of archival materialExpiredMar 05, 85Feb 09, 88[B05D]
4666287 Document copiersExpiredApr 29, 86May 19, 87[G03G]
4655478 Book supportExpiredAug 15, 85Apr 07, 87[B42D]
4645332 Photocopying deviceExpiredAug 15, 85Feb 24, 87[G03B]
4636868 CopiersExpiredDec 17, 84Jan 13, 87[H04N]
4633080 Document scanner having an improved book support assemblyExpiredNov 04, 83Dec 30, 86[H04N, G03B]
4623247 Document scannersExpiredDec 17, 84Nov 18, 86[G03B]
4585334 Document copiersExpiredDec 17, 84Apr 29, 86[G03G]
4586090 Document scannersExpiredNov 04, 83Apr 29, 86[H04N]
4574316 Document scannersExpiredNov 04, 83Mar 04, 86[H04N]
4567528 Document scannersExpiredNov 04, 83Jan 28, 86[H04N]

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