# Exxon Research and Engineering Co — Patents explained on PatentBrief

Exxon Research and Engineering Co has 1 landmark patent explained in plain English on PatentBrief.

- [Early Lithium-Ion Battery Design Using Chalcogenides](https://patentbrief.org/patent/us/4009052/rechargeable-lithium-battery) — granted 1977
  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.

**Full profile:** https://patentbrief.org/company/exxon-research-and-engineering-co

---

_Source: PatentBrief — https://patentbrief.org. Plain-English explanations of US patents._