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Porvair PLC

Porvair PL

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4157424A	Production of porous materials	Expired / Lapsed	1971-11-23	1979-06-05	31	Details
US3524753A	Method of making a microporous film	Expired / Lapsed	1964-11-24	1970-08-18	0	Details
US3496000A	Method of making artificial leather	Expired / Lapsed	1966-03-30	1970-02-17	0	Details
US3496042A	Process for making a porous polyurethane-fabric laminate	Expired / Lapsed	1966-03-30	1970-02-17	0	Details