What does patency mean?
Patency means the condition of being open, unobstructed, or available. Its best-known legal use concerns the status of an invention covered by a patent: patency is the state in which the invention has been publicly disclosed and protected against unauthorized use by the patent holder. The word can also describe the openness of a physical passage, such as a blood vessel, airway, or pipe, or more generally the availability of information or access to something. In this sense, patency carries a formal, technical tone rather than the everyday force of simply being open. The term is especially useful when precision matters, as in discussions of patent procedure, medicine, engineering, or the maintenance of a passage. Its connection with the idea of disclosure is also historically revealing: patency ultimately derives from the Latin for “open,” the same broad idea from which patent developed.
nounThe state of being open, unobstructed, or available, especially the legal status of an invention protected by a patent.
- The state of being open or unobstructed, especially in a legal or technical context.
- The state of being publicly disclosed or available rather than secret.
- The condition of a passage, such as a blood vessel or airway, remaining open.
"The patency of the patent allowed the inventor to exclude others from using the invention."
"The court questioned whether the invention had sufficient patency before the relevant filing date."
"The drug helped maintain patency of the narrowed artery."
The plural is uncommon and is most likely to appear in legal or highly technical prose.
"The patent attorney discussed the patencies of several earlier inventions."
A patent began as an open document: the word originally meant something publicly disclosed, and patency preserves that sense of openness.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of patency
Patency comes through late medieval English from Latin patentia, meaning “openness” or “publicity,” derived from patens, “open,” and ultimately from pateo, “to lie open.” The related English word patent retains this history: it originally referred to an invention or privilege made openly available. Latin patens and pateo preserve the same basic root idea of openness.
How patency is actually used
The word is formal and relatively uncommon. In patent law it refers to the openness or public availability associated with disclosure; in medicine and engineering it describes the continued openness of a passage or channel.
Easily confused with patency
A patent is the legal document or right that grants protection for an invention, whereas patency is the state of being open or protected by such a right.