The US Patent and Trademark Office has revised the Rules of practice in patent examinations in what it states is an attempt to make examination of patent applications in the Patent Office more effective and efficient. The Rule changes require a patent application to give justification for filing a continuing application for a third or subsequent continuing application. The justification will need to demonstrate why the amendment, argument or evidence could not have been submitted in the previously filed applications.

Patent applications having patentably indistinct claims may be required to be contained in one application unless good reason can be shown for the need for multiple copending applications.

Additionally, the Rules require that if an application contains more than five independent claims, or more than twenty-five total claims, the applicant must submit an examination support document covering all the claims.

The Rules changes shall be effective on November 1, 2007, and can impact applications already filed with the Patent Office.