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Harvel Research Corp

Harvel Res
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US2404840A Resins made with lignin and heat reactive condensation prod… Expired / Lapsed 1943-05-06 1946-07-30 0 Details
US2343972A Novel furfuryl alcohol-formaldehyde acid condensation resin… Expired / Lapsed 1943-02-24 1944-03-14 0 Details
US2343973A Acid condensation product of formaldehyde and acid condensa… Expired / Lapsed 1943-02-24 1944-03-14 0 Details