WHITE METAL ROLLING AND STAMPING CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4768620 Metal extension planksExpiredSep 16, 87Sep 06, 88[A47B, E04G]
4332308 Safety stepladdersExpiredJun 30, 80Jun 01, 82[E06C]
4266631 Extension ladders with rotary hook locksExpiredMar 26, 80May 12, 81[E06C]
4222460 Extension laddersExpiredMay 14, 79Sep 16, 80[E06C]
4204587 Ladder constructionsExpiredOct 13, 78May 27, 80[E06C]
4187928 StepladdersExpiredMar 06, 78Feb 12, 80[E06C]

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