Posts Tagged: "prosecution history estoppel"

Implications of Filing Subsequent Patent Applications in the United States (Part III)

In Part I, the authors reviewed the law behind subsequent patent applications. In Part II, we reviewed the different types of subsequent applications. Part III will discuss some of the implications of these. When an applicant seeks to add new claims pursuant to a continuation or divisional application, U.S. Patent Law explicitly requires that the original specification provide adequate support for the new claims by the original specification satisfying the Section 112(a) written description and enablement requirements for the new claims. 35 U.S.C. § 120. The same is also true for continuation-in-part (CIP) applications claiming overlapping subject matter but not for claims comprising “new matter” because the new matter claimed must find support in additional disclosure, i.e., in material added to the CIP application itself.

Federal Circuit Reiterates High Standard for Prosecution History Disclaimer

In a January 29, 2016 decision, the Federal Circuit vacated a jury judgment of non-infringement and ordered the District of Delaware to conduct a new trial where construction of a claim term based on prosecution history disclaimer was found to be too narrow. In rejecting the district court’s construction as too limiting, the Court emphasized the high standard for finding prosecution history disclaimer of claim scope. Examining the two prosecution history passages said to be a disclaimer, the Court found that each was readily susceptible to a narrower reading than the one needed to support the district court’s conclusion.

Track One By the Numbers. What are you Waiting for?

The USPTO has returned to the historical philosophy that patent examiners should work cooperatively with patent applicants to identify allowable subject matter and issue patents on what is allowable, not just focusing on rejection after rejection after rejection. While there are quite a few positive changes, with more in the works, Track One is by far the most successful policy initiative that has come to bear during the Kappos Administration. The only problem with Track One is that more applicants are not using it! What are you waiting for? A look at the numbers shows that Track One is a huge success and ought to be employed far more than it has been.

CAFC: Intervening Rights for Claims Unamended During Reexam*

I like writing about esoteric patent law topics and the question of “intervening rights” in reexaminations/reissues is one of the more esoteric. See my 1998 JPTOS article entitledIntervening Rights: A Potential Hidden Trap for Reexamined Patent. The case of Marine Polymer Technologies, Inc. v. HemCon, Inc. is one of those rare instances in this esoteric area of patent law where the Federal Circuit announced a new “wrinkle” on when “intervening rights” apply in reexamination. Unfortunately, the rule announced by the majority in Marine Polymer Technologies (“intervening rights” apply to unamended claims based on statements made during reexamination) is squarely in conflict with the express language of 35 U.S.C. § 307(b), as Judge Lourie’s dissent vigorously (and more importantly, correctly) points out.

Federal Circuit Again Rules Equivalent Foreseeable in Duramed

In Duramed, the invention claimed in U.S. Pat. No. 5,908,638 (the “’638 patent”) involved a conjugated estrogen pharmaceutical compositions for use in hormone replacement therapies. The critical aspect of the claimed invention was the moisture barrier coating (MBC) which surrounded the composition. Claim 7 (which depended from independent Claim 1) specified that this MBC “comprises ethylcellulose.” During patent prosecution, the examiner rejected both Claims 1 and 7 for obviousness under 35 U.S.C. § 103. As a result of an interview with the examiner, Claim 1 was amended to include the recitation in Claim 7, and in due course, the ‘638 patent issued. Sounds to me like a classical instance of prosecution history estoppel coming into play and barring any application of the doctrine of equivalents.