Aromatic Patents (Class 562/405)
- Nitro or nitroso (Class 562/434)
- Ureido, guanido, or hydrazine (Class 562/439)
- Nitrogen double bonded directly to carbon (e.g., amidine, ketimine, etc.) (Class 562/440)
- Plural rings bonded directly to the same carbon (Class 562/441)
- Nitrogen not bonded directly to a ring (Class 562/442)
- Oxy (Class 562/452)
- Halogen (Class 562/456)
- Plural rings with nitrogen bonded directly to at least one ring (Class 562/457)
- Carboxyl, or salt thereof, bonded directly to a ring (Class 562/458)
- Polycyclo ring system (Class 562/466)
- Plural rings bonded directly to the same carbon (Class 562/468)
- Rings bonded directly to each other (Class 562/469)
- Oxy, not bonded directly to a ring, in same side chain as carboxyl, or salt thereof (Class 562/470)
- Oxy, bonded directly to a ring, in same side chain as carboxyl, or salt thereof (Class 562/471)
- Carboxyl, or salt thereof, bonded directly to a ring (Class 562/473)
- Phenolic hydroxy or metallate (Class 562/478)
- Prepared by disproportionation (Class 562/481)
- Preparation by isomerization (Class 562/482)
- Preparation by hydrolysis of amide, anhydride, or ester (Class 562/483)
- Preparation by hydrolysis of nitrile (Class 562/484)
- Purification or recovery per se (Class 562/485)
- Plural rings (Class 562/488)
- Carboxyl not directly attached to a ring (Class 562/489)