How Do You Overcome a Section 103 Obviousness Rejection?

The Legal Framework

A Section 103 rejection asserts that the claimed invention would have been obvious to a person of ordinary skill in the art before the effective filing date. The analysis follows the factual inquiries of Graham v. John Deere Co. (1966):

1. The scope and content of the prior art
2. The differences between the prior art and the claims
3. The level of ordinary skill in the art
4. Objective indicia of nonobviousness, often called secondary considerations

KSR International Co. v. Teleflex Inc. (2007) rejected a rigid requirement for an explicit teaching, suggestion, or motivation to combine references. It also held that an obviousness rejection cannot rest on conclusory statements; the examiner must give some articulated reasoning with a rational underpinning. The examiner bears the initial burden of establishing a prima facie case. Most successful responses show that this burden has not been met.

Step 1: Map Every Limitation

Build a chart that places each limitation of each rejected claim against the passage the examiner cites. Read the references in full. The strongest argument is often the simplest: one limitation is not taught or suggested by any cited reference, alone or in combination. Check whether the examiner has quietly paraphrased a limitation, ignored a word, or relied on official notice for a feature that is not well known. If official notice is taken, you may traverse it and ask for documentary evidence.

Step 2: Challenge the Reason to Combine

Even when every element appears somewhere in the art, the rejection fails if the examiner has not explained why a skilled person would have combined the references in the claimed way, with a reasonable expectation of success. Useful arguments include:

• No articulated reasoning. The rejection states only that the combination would be "obvious" or "predictable" without explaining why.
• Teaching away. A reference criticizes, discourages, or leads in a different direction from the claimed approach.
• Inoperability or changed principle of operation. The proposed modification would render the primary reference unsatisfactory for its intended purpose or change its basic principle of operation.
• Non-analogous art. A reference is neither from the same field of endeavor nor reasonably pertinent to the problem the inventor faced.
• Hindsight. The combination is assembled using the application itself as a blueprint.

Explain these arguments with specific citations. General assertions that the examiner used hindsight rarely persuade on their own.

Step 3: Consider Removing a Reference

Under the AIA, some disclosures are excepted from the prior art:

• Section 102(b)(1). A disclosure made one year or less before the effective filing date by the inventor, or by another who obtained the subject matter from the inventor, is not prior art. The same applies to a third party's disclosure made after the inventor publicly disclosed the subject matter. See on-sale bar and grace period.
• Section 102(b)(2). A U.S. patent or published application can be excepted if the subject matter was obtained from the inventor, was publicly disclosed by the inventor first, or, under § 102(b)(2)(C), was owned by the same person or subject to an obligation of assignment to the same person no later than the effective filing date.

An exception under the first two categories is usually invoked with a declaration under 37 C.F.R. § 1.130. Common ownership is established with a statement in the response. Removing a primary reference often defeats the rejection entirely.

Step 4: Submit Evidence of Secondary Considerations

Objective indicia must be considered whenever they are presented. They include unexpected results, commercial success, long-felt but unsolved need, failure of others, industry praise, and copying by competitors. The evidence must have a nexus to the claimed features, and it must be commensurate in scope with the claims. Present it in a declaration under 37 C.F.R. § 1.132 with data, not conclusions. Unexpected results are strongest when compared against the closest prior art.

Step 5: Amend When the Rejection Is Sound

If the combination does teach the claim, add a feature from the specification that the references do not disclose and that has technical significance. Confirm written description support, and consider how the narrower claim will read on competitor products. Amendments create prosecution history estoppel, so amend only as much as needed.

Step 6: Talk to the Examiner

An interview lets you present the claim chart, test a proposed amendment, and learn what the examiner finds persuasive. Many § 103 rejections are resolved with a clarifying amendment agreed during an interview. If the examiner maintains a flawed rejection after final, an appeal may be the better path; see RCE vs appeal vs continuation.

Drafting the Response

Obviousness responses depend on precise element-by-element comparison with the cited art. ArcPrime's office action response tooling prepares that comparison and a first-draft response, so attorneys can focus on which argument to lead with.