https://patentbrief.org/company/exxon-research-and-engineering-co Plain-English explanations of patents assigned to Exxon Research and Engineering Co, newest first. en-us Sun, 12 Jul 2026 09:26:13 GMT https://patentbrief.org/patent/us/4009052/rechargeable-lithium-battery This 1977 patent describes an early rechargeable battery design using lithium as one electrode and titanium disulfide as the other, a key step towards modern lithium-ion technology. Tue, 22 Feb 1977 00:00:00 GMT https://patentbrief.org/patent/us/4009052/rechargeable-lithium-battery