"what every CHEMIST should know about PATENTS" (p. 17) http://www.chemistry.org/portal/resources/ACS/ACSContent/government/publications/Chem_patent2001.pdf
> Claim. A statement that defines the invention protected by a patent.
> ・An independent claim defines an invention without referring to another claim, for example,
> "Claim 1. A compound represented by the following formula (I)...."
> ・A dependent claim further defines the invention recited in another claim to which the
> dependent claim refers, for example, "Claim 2. A compound according to claim 1, wherein X is
> hydroxyl."
> ・A multiply dependent claim depends on more than one claim, for example, "Claim 3. A compound
> according to any one of claim 1 or 2, wherein Y is a heterocyclic aromatic fivemembered
> ring structure."
