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CALCO CHEMICAL CO Inc

CALCO CHEM

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2176013A	Spectrophotometer and spectrophotometric analysis and predi…	Expired / Lapsed	1937-08-12	1939-10-10	0	Details
US2157389A	Spectrophotometry	Expired / Lapsed	1938-01-14	1939-05-09	0	Details
US2152851A	Solution of alkali metal salts of polynuclear phenols	Expired / Lapsed	1936-09-04	1939-04-04	0	Details
US2126410A	Spectrophotometer	Expired / Lapsed	1935-03-18	1938-08-09	0	Details
US2107836A	Spectrophotometer	Expired / Lapsed	1936-02-24	1938-02-08	0	Details