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Westvaco Corp

Westvaco C

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4244728A	Cross-linked lignin gels	Expired / Lapsed	1976-02-03	1981-01-13	6	Details
US4190161A	Compartmented envelope	Expired / Lapsed	1978-11-29	1980-02-26	5	Details
US3991022A	Process for making lignin reinforced polymers	Expired / Lapsed	1974-07-15	1976-11-09	7	Details
US3953713A	Reel diameter discriminator	Expired / Lapsed	1974-11-04	1976-04-27	12	Details
US3450886A	Apparatus and method for measuring the concentration of a s…	Expired / Lapsed	1967-10-26	1969-06-17	0	Details