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NAT CARBON CO Inc

NAT CARBON

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
GB468762A	Improvements in and relating to closure means and seals for…	Expired / Lapsed	1936-01-10	—	0	Details
US1890969A	Method of treating water	Expired / Lapsed	1928-12-13	1932-12-13	0	Details
US1786205A	Transparent film	Expired / Lapsed	1928-07-02	1930-12-23	0	Details
US1773229A	Dry-cell manufacture	Expired / Lapsed	1927-05-23	1930-08-19	0	Details