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Roessler and Hasslacher Chemical Co

Roessler a

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US1871019A	Process for concentrating formaldehyde solutions	Expired / Lapsed	1930-03-26	1932-08-09	0	Details
US1783738A	Opacifier for enamels	Expired / Lapsed	1928-01-12	1930-12-02	0	Details
US1627366A	Testing machine	Expired / Lapsed	1925-03-31	1927-05-03	0	Details
US1245688A	Method of and apparatus for testing gases.	Expired / Lapsed	1916-07-03	1917-11-06	0	Details