A reader posed a few questions about patent reexamination yesterday. The questions were:
- Is there any statistical data out there on how quickly reexamination happens?
- Whether the litigation is put on hold (stay)?
- What percentage of reexaminations hold the patent invalid?
- What is the average length of a reexamination?
I did some brief research and uncovered the following:
Ashley N. Parker wrote an article titled, "Problem Patents: Is Reexamination Truly a Viable Alternative to Litigation?" (NORTH CAROLINA JOURNAL OF LAW & TECHNOLOGY, VOLUME 3, ISSUE 2: SPRING 2002) that stated, in part:
In 1992, the Advisory Commission on Patent Law Reform issued a report which recommended a number of proposed improvements to the reexamination system. The Commission recommended providing an efficient system that could accommodate validity challenges more quickly and inexpensively than litigation. It focused on three main methods:
- increasing third party participation;
- increasing the number of substantive grounds upon which validity challenges may be based; and
- granting third party requesters the right to appeal.
In 1999, Congress, with the American Inventors Protection Act, finally passed a small measure of reexamination reform by granting optional inter partes reexamination. However, the Act as enacted gave third party requesters only a fraction of what the Advisory Commission originally proposed and of what was included under the Patent Reexamination Reform Act of 1994. Although the Act did partially increase third party participation, it did nothing to increase the number of substantive grounds upon which validity challenges may be based, nor to grant third party requesters the right to appeal.
When faced with a problem patent, a third party has two options in contesting the patent’s validity: (1) file a declaratory judgment action of patent invalidity in its local district court; or (2) request reexamination of the patent by the Patent Office, choosing either ex parte or inter partes reexamination. Inter partes reexamination is supposed to encourage third parties to use reexamination as an alternative to litigation when dealing with patent validity issues. However, even if a third party elects this new provision, the option of reexamination still appears to favor patent holders. Inter partes reexamination carries multiple consequences, which the third party requester must seriously consider before any decisions are made.
Congress made an effort to expand the rights of third party requesters when it passed optional inter partes reexamination in the hope of encouraging the use of the reexamination process over litigation. However, as evidenced above, a careful balance of the advantages and disadvantages of using this new provision weighs heavily in favor of not using it as an alternative to litigation. The most recent statistics released by the Patent Office in their FY 2000 USPTO Annual Report seem to support this conclusion. As of September 30, 2000, third parties filed only 172 requests for reexamination in 2000. This was a slight decrease from the previous year and a twenty-three percent decrease from the number of reexaminations requested by third parties as of September 30, 1996. Although statistically it is still hard to tell exactly what effect inter partes reexamination will have on the number of third party requested reexaminations, intuitively it appears that the trend will be away from reexamination.
Dale L. Carlson and Jason Crain wrote an article titled, "Reexamination: A Viable Alternative to Patent Litigation?" (3 YALE SYMP. L. & TECH. 2 (2000)) that stated, in part:
Because the inter partes reexamination is so new and there will not be a patent that could possibly go through this procedure for another year, the only data available covers original examinations, interference procedures, and the ex parte reexamination procedure. Over the course of five years we have collected a significant amount of data to show what the trends are, at least for indicating a bias or lack of bias. In studying the ex parte reexamination, we looked at the first step, when a third-party requester submits a request with prior art to the PTO and asks the PTO to determine whether the prior art raises a new question of validity. That would be the first and most logical point for any bias to manifest itself, because the request goes back to the same examiner. The examiner's inclination might be just to say, "Not a significant question," and be done with it; however, the statistics that we gathered from 1984 to 1988 showed that only ten percent of ex parte reexamination requests were turned down. In ninety percent of the cases the examiner was willing to say, "Yes, this is significant, let's take a look at this again." Thus, little bias against third parties requesting reexaminations is apparent.
The next place that bias might show up is in the actual result of the reexamination. The third party only gets one brief in which to explain its argument, while the patent owner files written arguments and converses with the examiner for six months to year, working out how the patent can still stand in light of the new prior art. It really is not a fair shake for a third party, and thus you would think that almost all claims would sail through ex parte reexamination unscathed. What we found, though, was something drastically different. The Advisory Committee found that twenty-four percent of ex parte reexaminations resulted in the confirmation of all claims. While a quarter do sail through unscathed, sixty-four percent end up with the cancellation of some claims, and twelve percent result in the cancellation of the entire patent. Thus, seventy -six percent of third parties' reexamination requests result in findings at least partially in their favor.
Included in the inter partes procedure are particular rights of appeal for the third party. If the inter partes reexamination goes against the third party, the third party has a right to appeal to the BPAI. Is the BPAI a fair panel for such an appeal? Are they rubber-stampers for the examiners, or are they indeed legitimate second checks on what the examiners are doing? We performed a study, again with the 1984 to 1988 data, on interferences and examinations that were contested to the BPAI. These are cases where the BPAI was asked to rule against the patent examiner or the patent owner. The BPAI fully or partially reversed the examiner thirty - nine percent of the time: 3827 instances out of 9791 appeals to that board over four years. Furthermore, the BPAI reversed and remanded on some points thirteen percent of the time. Therefore, roughly fifty percent of the time the examiner's decisions were affirmed, but fifty percent of the time they were either fully or partially reversed. These data sets-the statistics on ex parte reexamination requests and results and the statistics on BPAI reversals-indicate that the new inter partes reexamination can be a fair venue for the third party.
These articles are somewhat dated, so take a look at the U.S. Patent and Trademark Office's "Performance and Accountability Report Fiscal Year 2007" TABLE 13A: EX PARTE REEXAMINATION (FY 2003 - FY 2007) and TABLE 13B: INTER PARTES REEXAMINATION (FY 2003 - FY 2007).
I am interested in hearing from anyone who has some additional input on the reexamination process. Feel free to post a comment here.