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Chapman Valve Manufacturing Co

Chapman Va

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2711188A	Check valve	Expired / Lapsed	1951-05-10	1955-06-21	0	Details
US2268518A	Valve structure	Expired / Lapsed	1940-04-08	1941-12-30	0	Details
US2238778A	Treatment of steel	Expired / Lapsed	1940-06-21	1941-04-15	0	Details
US1915065A	Creep resistant noncorrosive steel	Expired / Lapsed	1932-04-21	1933-06-20	0	Details
US777372A	Motor-driven valve mechanism.	Expired / Lapsed	1902-09-18	1904-12-13	0	Details