What is meant by "small entity status"?

If the owner of the invention qualifies as a small entity (e.g., independent inventor, a small business, or a nonprofit organization), the filing, issue and maintenance fees are reduced by half.

For additional information on small entity status fees, you may visit our web site at www.uspto.gov/go/fees.

see also SMALL ENTITY definition

USPTO FAQ - Questions and Answers (14AUG2003)