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Hepworth Iron Co Ltd

Hepworth I

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
GB1223276A	Improvements in or relating to pipe couplings	Expired / Lapsed	1968-09-23	—	0	Details
GB1023729A	Improvements in or relating to pipe couplings	Expired / Lapsed	1965-02-13	—	0	Details
GB956046A	Improvements in sub-soil drains	Expired / Lapsed	1961-08-11	—	0	Details
US3645547A	Pipe couplings	Expired / Lapsed	1969-10-17	1972-02-29	7	Details
US3516693A	Pipe couplings	Expired / Lapsed	1968-04-08	1970-06-23	0	Details