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In the law of Patents, the presence of two pending applications, or an existing patent and a pending application that encompass an identical invention or discovery.

When interference exists, the Patent and Trademark Office conducts an investigation to ascertain the priority of invention between the conflicting applications, or the application and the patent. A patent is customarily granted to the earlier invention.


noun antagonism, antipathy, bar, barrier, censure, check, collision, conflict, contravention, damper, disapproval, disturbance, encumbrance, fetter, frustration, hindrance, impediment, imposition, interception, intercession, intermediacy, interruption, intervention, intrusion, invasion, meddling, nuisance, obstruction, onus, opposition, resistance, restraint, setback, stricture, stumbling block
Associated concepts: contempt, frustration of contract, interrerence with contractual relations
See also: bar, barrier, burden, check, collision, conflict, damper, deterrence, deterrent, disadvantage, dispute, embargo, encroachment, encumbrance, fetter, filibuster, frustration, handicap, hiatus, hindrance, impediment, imposition, infringement, intercession, interruption, intervention, intrusion, invasion, mediation, molestation, nuisance, obstruction, onus, opposition, prohibition, resistance, restraint, veto
References in classic literature ?
Let her understand clearly what the result of his interference would be.
Having no excuse for open interference, he made an effort to part them.
Let me only persuade him that his interference at this moment will save him inevitable trouble and wretchedness and responsibility hereafter, and he will bestir himself for his own sake.
Would it be possible to place Sir Percival between the two alternatives of either exposing himself to the scandal of legal interference on his wife's behalf, or of allowing her to be quietly separated from him for a time under pretext of a visit to her uncle's house?
Most critical issue in the deployment of femto cell in the macro cell are potential interferences, to reduce the interference in the wireless communication system some of the major techniques are interference coordination, interference cancellation, coordinated multipoint transmission and reception and interference alignment.
Here are some examples of interferences that SIC could identify:
Immunoassay interferences are diverse in scope (1-8) and are the subject of several recent large-scale studies (9,10), opinions, and editorials (6,11).
The spatial and angular distributions of the neutrons incident on the samples in view of the possible slit interferences through the three serial slits in Fig.
Board of Patent Appeals and Interferences when a patent and an allowed patent application claim essentially the same invention.
In late 2004 and again in early 2005, the Board of Patent Appeals and Interferences of the U.
Geron acquired rights to this technology from the Roslin Institute in 1999 and subsequently initiated patent interferences with conflicting patents held by the University of Massachusetts.
NYSE:ENZ) announced today that the United States Patent and Trademark Office has declared two patent interferences designating an allowable Enzo Life Sciences patent application against patents held by Chiron Diagnostics and Princeton University for nucleic acid detection.