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Patent Number Title Assignee Status Filing Date Grant Date Expires Remaining Claims Actions
US4389487A Process for the preparation of a collagen product for medical and cosmetic purposes DSM Nutritional Products AG Expired / Lapsed 1980-09-17 1983-06-21 2000-09-17 0.0 yrs 8
US4066083A Sterile surgical collagen product DSM Nutritional Products AG Expired / Lapsed 1976-06-03 1978-01-03 1996-06-03 0.0 yrs 3