South African Invention Development Corporation

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4923403 Microbiological process for degradation of steroidsExpiredAug 15, 85May 08, 90[C12R, C12P, C12N]
4894229 Carrier-bound immunogenic determinants and carrier thereforExpiredApr 21, 86Jan 16, 90[A61K, C12N]
4845042 Adjuvant for immunizationExpiredApr 04, 85Jul 04, 89[A61K, G01N]
4825702 Yarn testing methodExpiredApr 06, 87May 02, 89[G01N]
4735149 Railway vehicle suspensionExpiredMar 31, 86Apr 05, 88[B61F]
4707420 Power storage batteryExpiredMay 08, 86Nov 17, 87[H01M]
4691069 Hydrogentation of unsaturated aliphatic hydrocarbonsExpiredFeb 19, 86Sep 01, 87[C07C]
4628654 Composite floor structuresExpiredSep 19, 83Dec 16, 86[E04B]
4594543 Lightning warning systemExpiredNov 07, 83Jun 10, 86[G01N]
4550019 Manufacture and use of fowl egg antibodiesExpiredJul 16, 82Oct 29, 85[A61K]
4540287 Asphalt recyclingExpiredDec 01, 83Sep 10, 85[B28C]
4534169 Power transmission systemExpiredJun 04, 82Aug 13, 85[B60K, F01B]
4527569 Device for guiding a surgical needle into a blood vesselExpiredNov 15, 83Jul 09, 85[A61B]
4506681 Surgical implantExpiredOct 26, 82Mar 26, 85[A61F]
4480553 Stabilized railway vehicleExpiredAug 31, 82Nov 06, 84[B61F]
4478946 Carrier bound immunosorbentExpiredJun 25, 82Oct 23, 84[G01N]
4457989 Electrochemical cell and an anode structure for an electrochemical cellExpiredSep 28, 81Jul 03, 84[H01M]
4443913 CreelExpiredJul 21, 81Apr 24, 84[B65H, D01H]
4403857 Distance measuring device and methodExpiredOct 23, 80Sep 13, 83[G01C]
4366215 Electrochemical cellExpiredOct 30, 80Dec 28, 82[H01M]

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