Really? Two Expiration Dates? Yes.
The Usual Sequence
The patent examiner declares in the First Office Action that there is more than a single invention disclosed in the parent patent application which allows the filing of a divisional. Before further examination, the examiner requires that the Applicant select a first invention for examination. This is known as a Restriction Requirement.
The Statutory Combo: 35 U.S.C. § 154(b) (PTA) + the § 121 Divisional Safe Harbor
This combination of statutory law allows the extension of a divisional patent application’s term beyond the parent’s twenty-year legal monopoly.
- 35 U.S.C. § 154(b): Governs Patent Term Adjustment (PTA). As a result of USPTO delays in examination that exceed three years, the PTA adds “bonus life” to the patent term. (Note: Over the years, Business Patent Law, PLLC has seen extensions of four years or more.)
- 35 U.S.C. § 121: This provides the “Safe Harbor” for divisional applications. It states that a divisional application filed because of a restriction requirement cannot be rejected based on the parent patent for double patenting.
How PTA Calculations Work
The PTA is calculated independently for each application. Depending on the USPTO’s specific delays, the parent and the divisional patent applications are eligible for different PTAs. Upon filing a divisional, its own PTA clock begins.
When a divisional application is filed because the examiner issued a restriction requirement, the USPTO cannot use the parent patent as a reference to reject the divisional for double patenting (and vice-versa). Since you aren’t forced to file a Terminal Disclaimer, every single day of PTA belongs to the owner of the divisional patent.
Turning a Restriction into an Enhanced Asset
- Multiple Monopolies: In the IP world, distinct but similar inventions are a preferred way of doing business.
- Stepped Expirations: Staggered expiration dates provided by a divisional make it much more difficult for competitors to “design around” or wait out your protection.
- Mutually Beneficial: When innovation and engineering are symbiotic, we can precisely select which inventions should be maximized by the PTA and include several of those into the parent application to trigger the divisional process.
- Too Much Of A Good Thing: Being overzealous can be detrimental if there are too many inventions flowing from the parent application.
- Management’s Wisdom: Just because you can, does not mean you should. The “good ole days” of “submarine patents” are a vapor in time, but the divisional patent PTA is the law of the land today.
Business Patent Law, PLLC can assist your company with the strategic architecture of parent and divisional patent applications.
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Prepared by the Business Patent Law, PLLC, editorial staff. Counseling the Creative®