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US patent class 715: data processing: presentation processing of document, operator interface processing, and screen saver display processing
In the U.S., a process for opposing patents covered by the AIA. PGR allows a 3rd party to question a patent during the first 9 months from issue.
US patent class 435: chemistry: molecular biology and microbiology
Enablement, or sufficiency of disclosure, is the requirement that a patent allows a person skilled in the art to reproduce the claimed invention.
US patent class 455: telecommunications
Inequitable conduct is a defense against an infringement charge. If proven, the patent would destroyed.