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Copperweld Steel Co

Copperweld

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2266972A	Method of making composite sheets	Expired / Lapsed	1940-07-23	1941-12-23	0	Details
US2234656A	Insulator tie for electric conductors	Expired / Lapsed	1938-12-31	1941-03-11	0	Details
US2196002A	Method of treating electro-deposited metal	Expired / Lapsed	1938-06-13	1940-04-02	0	Details
US2114161A	Electrolytic copper	Expired / Lapsed	1935-12-04	1938-04-12	0	Details