Patent applications are rarely allowed without amendment. During examination, Examiners may raise objections to the claims, description, or drawings, requiring applicants to amend their applications. These amendments help clarify the invention and distinguish it from the prior art.
The right to amend, however, has its limits. Once an application is filed, applicants cannot add information that was not originally disclosed. They may clarify or narrow the original disclosure, but they cannot expand it by introducing new matter.
This principle is embodied in Section 49 of the Intellectual Property Code, which provides: ” An applicant may amend the patent application during examination: Provided, That such amendment shall not include new matter outside the scope of the disclosure contained in the application as filed.”
The 2022 Revised Implementing Rules and Regulations implement this requirement. Every amendment must identify its basis in the application as originally filed. Applicants must specify the proposed amendments and indicate where support for them can be found in the original specification.
The Manual for Patent Examination Procedure (MPEP) further provides that Examiners must deny amendments that introduce new matter and require Applicants to remove the impermissible material.
Not every amendment, however, introduces new matter. The MPEP allows factual references to prior art when necessary to place the invention in its proper technical context. It also allows replacement drawings that improve clarity or comply with formal requirements, provided they do not broaden the original disclosure.
The question is simple: Was the amended subject matter already disclosed, either expressly or inherently, in the application as originally filed? If not, the amendment cannot be admitted, regardless of its technical merit.
What Constitutes “New Matter” Under Philippine Patent Practice?
While Section 49 prohibits the introduction of new matter, it does not define the term. New matter refers to information that a person skilled in the art could not directly and unambiguously derive from the application as originally filed.
A narrowing amendment is not always permissible.
Narrowing a claim does not necessarily avoid a new-matter objection.
For example, if the original specification discloses a composition containing 5% to 20% polymer, amending the claim to 10% to 15% polymer is generally permissible because the narrower range is supported by the original disclosure.
By contrast, if the application merely states that the composition contains polymer, introducing a limitation such as 12% polymer during prosecution may constitute new matter because the original application did not disclose that value.
The same principle applies to temperatures, pressures, concentrations, dimensions, reaction times, electrical parameters, and other technical limitations. Values introduced for the first time during prosecution may be objected to if they are not supported by the original disclosure.
New embodiments cannot be introduced after filing.
Again, by way of example, an applicant who originally disclosed a rechargeable lithium-ion battery cannot later amend the specification to claim a lithium-sulfur battery if that embodiment was never disclosed. Although both technologies perform similar functions, the amendment changes the technical disclosure. If the later embodiment itself is a new technical contribution, the proper course is to file a separate patent application.
Newly discovered advantages must also be supported.
Inventors often continue testing their inventions after filing, and additional experiments may reveal new technical benefits. These later discoveries, however, do not automatically become part of the pending application.
To illustrate, the original specification may only state that the invention improves filtration efficiency. The applicant cannot later add that it also doubles membrane lifespan unless the original disclosure supports that technical effect.
Drawings may clarify, but not expand, the disclosure.
Replacement drawings are generally acceptable when they improve clarity or comply with formal requirements. They become objectionable if they introduce structural elements that were never shown or described in the original application. The issue is not the drawing itself, but the additional technical disclosure it introduces.
The original specification defines the permissible scope of amendment.
Applicants sometimes attempt to overcome novelty or inventive-step objections by relying on laboratory records, foreign applications, technical reports, or later publications. While these materials may accurately describe the inventor’s work, they do not form part of the Philippine application unless they were disclosed at the time of filing. The permissible scope of any amendment is therefore determined by the original application, not by information developed or obtained after filing.
Drafting a Patent Application with Future Amendments in Mind
The solution to most new-matter objections begins long before the first Office Action. Once an application is filed, the applicant is limited to what was originally disclosed. If an important technical feature has been omitted, it generally cannot be added later.
For this reason, the specification should therefore disclose not only the preferred embodiment, but also reasonable alternatives contemplated by the inventor. It should also distinguish between essential and optional features. Disclosing alternative embodiments or components from the outset gives applicants more options if prior art is later cited against the broader claims.
Meaningful dependent claims are equally important because they provide narrower claim limitations that may later be incorporated into the independent claims. Applicants should also disclose supported numerical ranges. The specification should explain the technical problem, how the invention solves it, and the resulting technical effect. These disclosures often provide the basis for later amendments.
Applicants should also avoid incorporating improvements developed after filing, as these generally belong in a separate patent application. A well-prepared specification makes it easier to respond to Office Actions without introducing new matter.
Section 49 of the Intellectual Property Code allows patent applications to be amended during examination, but only within the bounds of the original disclosure. The ability to amend an application therefore depends largely on the quality of the specification filed at the outset. A complete and well-supported specification gives applicants the best opportunity to respond to Office Actions without introducing new matter.
In this context, retaining a duly licensed attorney during the drafting stage and at all stages of the patent application process is good practice.
Atty. Criszus V. Ibon, ECE, ECT Associte, Sapalo Velez Bundang Bulilan Law Offices. For comments, e-mail info@sapalovelez.com, or call +632 8891-1316
