- Subject matter: living organisms, YES; math, NO (see Diamond v. Chakrabarty)
- Novelty/Non-obviousness
- Utility/Usefulness
- Non-triviality
- Adequate Disclosure: enablement and written description
See
Patent Act Section 101: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title.