H.D. ACQUISITION CORP., A CORP. OF DE.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4736027 Indole-phthalide derivativesExpiredDec 04, 86Apr 05, 88[C07D]
4732991 Substituted phthalidesExpiredFeb 18, 86Mar 22, 88[C07D]
4707373 Edible compositions colored with (2-alkoxy-4-sulfonyl-5-alkyphenyl)azo-1-hydroxynaphthalene sulfonic acidsExpiredJul 18, 86Nov 17, 87[A23L]
4697018 9-julolidinyl derivatives and process of preparing themExpiredSep 30, 85Sep 29, 87[C07D]
4688059 Marking systemsExpiredOct 20, 86Aug 18, 87[B41M]
4675389 (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acidsExpiredJun 05, 84Jun 23, 87[A23L, C09B, D06P]
4661605 3-(ether and thioether)-3-(indolyl)-phthalidesExpiredJan 24, 85Apr 28, 87[C07D]
4660060 Imaging systems containing 3-(indol-3-yl)-3-(4-substituted aminophenyl)phthalidesExpiredJun 17, 85Apr 21, 87[B41M]
4652643 3-amido-7-disubstituted amino-10-carbonylphenothiazinesExpiredApr 03, 86Mar 24, 87[C07D]
4639750 Fluoran compounds and marking systemsExpiredFeb 24, 86Jan 27, 87[C07D, C09D]
4636820 Compositions, process and systemsExpiredJan 17, 85Jan 13, 87[B41M]
4632783 Triphenylmethane dyestuffsExpiredMay 13, 85Dec 30, 86[C09B]
4618684 Substituted indolesExpiredJul 13, 84Oct 21, 86[C07D]
4604458 3-substituted carbonyloxy-7-disubstituted amino-10-substituted carbonylphenothiazinesExpiredSep 03, 85Aug 05, 86[C07D]
4604461 5-substituted-9-disubstituted amino-12-substituted carbonylbenzo[a]phenoxazinesExpiredSep 03, 85Aug 05, 86[C07D]
4604462 4-substituted amido-8-disubstituted aminoimidazophenoxazinesExpiredSep 03, 85Aug 05, 86[C07D]
4595536 Triphenylmethane dyestuffExpiredMay 13, 85Jun 17, 86[C09B]
4595768 3-(substituted phenyl)phthalidesExpiredApr 23, 84Jun 17, 86[C07D]
4570171 Electrochromic marking systemsExpiredJul 31, 84Feb 11, 86[B41M]
4561001 Electrochromic marking systemsExpiredJul 31, 84Dec 24, 85[B41M]

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