https://patentbrief.org/company/carter-wallace-inc Plain-English explanations of patents assigned to Carter Wallace Inc, newest first. en-us Mon, 15 Jun 2026 06:00:22 GMT https://patentbrief.org/patent/us/4810490/tpa-tissue-plasminogen-activator A 1989 patent for a transparent, water-resistant sunscreen formula that uses wood rosin to create a non-sticky, long-lasting protective film on the skin. Tue, 07 Mar 1989 00:00:00 GMT https://patentbrief.org/patent/us/4810490/tpa-tissue-plasminogen-activator