Patent attorney serves as counsels to corporations or individuals. Patent attorney helps determine if the invention is patentable. Patent attorney does this by evaluating the invention. Depending on the result of the evaluation, patent attorney advises the client as to whether a patent application should be filed on the invention. During the evaluation phase, patent attorney conduct in-depth investigation into the technical field involved, including study of the closest prior patents and references and a comparison with the invention to identify differences.

The Patent Trademark Office carefully reviews the application in order to determine the invention’s patentability. Upon submission of a patent application to the Patent Trademark Office an Examiner reviews the application and prepares an opinion as to whether the application complies with the Patent Trademark Office applicable rules and regulations, and whether the invention is indeed “patentable.”

The patent cost can be very high for some people which the U.S. Patent Trademark Office charges a minimum of about $4,000 over the life of the patent. A patent application submitted to Patent Trademark Office must contain: (1) a written description of the invention; and (2) claims particularly pointing out and distinctly claiming the invention.

Patent protection provides security to the patent applicant against patent infringement. Patent infringement would occur if someone made, used or sold your patented door lock without your permission in a country that has granted you a patent, during the term of the patent.