APCO Valve and Primer Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5090439 Atmospheric compensating automatic air release valveExpiredJul 24, 89Feb 25, 92[F16K]
4834621 Air throttling valve for submerged pump systemExpiredNov 24, 87May 30, 89[F04B, F03B]
4586528 Air release valveExpiredMar 05, 85May 06, 86[F16K]

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