The estoppel provision of 35 U.S.C. § 315(e)(1) had largely prevented requesters from challenging claims of a patent via ex parte reexamination after an inter partes review (IPR) that resulted in a final written decision...more
7/30/2025
/ Burden of Proof ,
Estoppel ,
Evidence ,
Ex Partes Reexamination ,
Final Written Decisions ,
Inter Partes Review (IPR) Proceeding ,
Obviousness ,
Patent Invalidity ,
Patent Litigation ,
Patent Ownership ,
Patent Trial and Appeal Board ,
Patents ,
Prior Art ,
USPTO
Obvious-type double patenting (ODP) has historically served as a tool to prevent patent owners from extending exclusivity beyond the statutory allowed patent term and to tie patent families together during sale. Historically,...more
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
7/29/2025
/ Central Reexamination Unit (CRU) ,
Double Patent ,
Estoppel ,
Ex Partes Reexamination ,
Final Written Decisions ,
Obviousness ,
Obviousness-Type Double Patenting (ODP) ,
Patent Applications ,
Patent Invalidity ,
Patent Re-Examination ,
Patent Reissue Applications ,
Patents ,
USPTO
As the Patent Trial and Appeal Board and the Acting USPTO Director refocus challengers, and with them Patent Owners, towards reexamination from inter partes review proceedings, the need to understand the nuance of “new” in...more
7/14/2025
/ Appeals ,
Ex Partes Reexamination ,
Innovation ,
Inter Partes Review (IPR) Proceeding ,
Obviousness ,
Patent Applications ,
Patent Trial and Appeal Board ,
Patent Validity ,
Patents ,
Prior Art ,
USPTO
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
Takeaways:
- Claim construction for determining whether reissue claims are improperly broadened is based on fundamental claim construction cannons and not applicant intentions.
- Patent Owners should check patented claims...more
5/29/2025
/ Appeals ,
CAFC ,
Claim Construction ,
Inventors ,
Patent Litigation ,
Patent Ownership ,
Patent Reissue Applications ,
Patent Trial and Appeal Board ,
Patent Validity ,
Patents ,
Reissue Patents
Requesters should make sure to double cite to non-provisional and provisional if they require a provisional filing date for prior art....more
Estoppel certification in reexamination prevents relitigation of resolved issues....more
The Federal Circuit held in Merck Sharp & Dohme B.V. v. Aurobindo Pharma USA, Inc., 23-2254 that a reissued patent receives patent term extension (PTE) based on the issue date of the original patent, not the reissue patent,...more
4/4/2025
/ Appeals ,
FDA Approval ,
Hatch-Waxman ,
Patent Litigation ,
Patent Term Extensions ,
Patents ,
Pharmaceutical Industry ,
Pharmaceutical Patents ,
Prescription Drugs ,
Regulatory Requirements ,
Statutory Interpretation
After eight weeks of shifts in governmental policies, the patent bar is feeling repercussions from all directions. One critical area in flux is the post-grant challenge arena.
With a reduced PTAB head count and a steady...more
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
4/3/2025
/ Food and Drug Administration (FDA) ,
Hatch-Waxman ,
Intellectual Property Litigation ,
Intellectual Property Protection ,
Patent Applications ,
Patent Litigation ,
Patent Ownership ,
Patent Re-Examination ,
Patent Term Extensions ,
Patent Trial and Appeal Board ,
Patents ,
Pharmaceutical Patents ,
Reissue Patents ,
USPTO
Takeaways -
- Expired patents may be eligible for reexamination.
- Owner’s options during reexamination of an expired patent are severely limited.
Similar to reexamination practice, which has long allowed reexamination...more
3/12/2025
/ Administrative Proceedings ,
Central Reexamination Unit (CRU) ,
Claim Construction ,
Director of the USPTO ,
Intellectual Property Litigation ,
Intellectual Property Protection ,
Inter Partes Reexamination ,
Inter Partes Review (IPR) Proceeding ,
Patent Expiration ,
Patent Infringement ,
Patent Ownership ,
Patent Trial and Appeal Board ,
Patents ,
Revocation ,
USPTO
Takeaways -
- Pre-AIA patents may be able to “swear behind” prior art applied in reissue and reexamination.
- “Swearing behind” has limits and obtaining sufficient evidence to establish prior invention may be difficult to...more
3/10/2025
/ America Invents Act ,
Central Reexamination Unit (CRU) ,
Intellectual Property Protection ,
Inter Partes Review (IPR) Proceeding ,
Patent Applications ,
Patent Litigation ,
Patent Reissue Applications ,
Patent Trial and Appeal Board ,
Patents ,
Prior Art ,
Reissue Patents ,
USPTO
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
2/26/2025
/ Central Reexamination Unit (CRU) ,
Intellectual Property Protection ,
Inter Partes Reexamination ,
Patent Applications ,
Patent Expiration ,
Patent Invalidity ,
Patent Litigation ,
Patent Reissue Applications ,
Patents ,
Prior Art ,
Reissue Patents ,
Supplemental Examination ,
USPTO
Takeaways -
-Intra-patent claim inconsistencies are errors correctible via reissue.
-Subtle legal distinctions in reissue may require PTAB appeals.
Patent prosecution errors occur. One such error that occurs is...more
2/14/2025
/ Administrative Procedure Act ,
Appeals ,
Central Reexamination Unit (CRU) ,
Claim Amendments ,
Claim Construction ,
Patent Litigation ,
Patent Prosecution ,
Patent Reissue Applications ,
Patent Trial and Appeal Board ,
Patents ,
Reissue Patents ,
USPTO
Takeaways -
- Requestor submissions in reexamination proceedings are exempt from triggering IDS size fees.
- Correcting filing benefit claims in reissue triggers the new continuing application fee.
As we noted in our...more
2/12/2025
/ Application Fees ,
Fees ,
Intellectual Property Protection ,
Inter Partes Reexamination ,
Patent Applications ,
Patent Litigation ,
Patent Reissue Applications ,
Patents ,
Regulatory Requirements ,
Reissue Patents ,
USPTO
The Patent Trial and Appeal Board (PTAB) continues to play a pivotal role in shaping the intellectual property landscape. In 2024, several developments affecting PTAB practice emerged, from new rulemaking at the USPTO to key...more
2/4/2025
/ §315(e) ,
Administrative Procedure Act ,
America Invents Act ,
Appeals ,
Corporate Counsel ,
Director of the USPTO ,
Final Rules ,
Intellectual Property Litigation ,
Intellectual Property Protection ,
Inter Partes Review (IPR) Proceeding ,
Obviousness ,
Patent Litigation ,
Patent Ownership ,
Patent Trial and Appeal Board ,
Patents ,
Prior Art ,
Rulemaking Process ,
Section 102 ,
Statistical Analysis ,
Statutory Interpretation ,
Technology ,
USPTO
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
2/3/2025
/ Ambiguous ,
Central Reexamination Unit (CRU) ,
Fees ,
Indefiniteness ,
Intellectual Property Protection ,
Patent Applications ,
Patent Litigation ,
Patent Reissue Applications ,
Patent Trial and Appeal Board ,
Patents ,
Regulatory Agenda ,
Reissue Patents ,
USPTO
According to recent U.S. Patent and Trademark Office (Office) data, the Office receives a burdensome number (13%) of information disclosure statements (IDSs) having in excess of 50 total items of information. 89 Fed. Reg....more
12/3/2024
/ Ex Partes Reexamination ,
Information Disclosure Statement ,
Patent Applicants ,
Patent Examinations ,
Patent Fees ,
Patent Litigation ,
Patent Ownership ,
Patent Re-Issue ,
Patent Reissue Applications ,
Patents ,
USPTO
Patent Examiners rely upon the Manual of Patent Examination Procedure (MPEP) to instruct application of the law to the most common patent prosecution situations. The MPEP’s forward refers to itself as a “guidance document”...more
In the mid-2000s, the U.S. Patent Office (USPTO) determined that reexaminations would be more consistent and legally correct if performed by a centralized set of experienced and specially trained Examiners. As a result, the...more
11/27/2024
/ Central Reexamination Unit (CRU) ,
Ex Partes Reexamination ,
Information Disclosure Statement ,
Inter Partes Review (IPR) Proceeding ,
Manual of Patent Examining Procedure (MPEP) ,
Patent Applicants ,
Patent Examinations ,
Patent Fees ,
Patent Litigation ,
Patent Ownership ,
Patent Re-Issue ,
Patent Reissue Applications ,
Patents ,
Prior Art ,
USPTO
Ex parte reexamination proceedings have been available for over 40 years. The reexamination statutes, Public Law 96-517 of July 1, 1981 (also known as the Bayh-Dole Act), included 35 U.S.C. § 303, which codified, in part,...more
11/7/2024
/ America Invents Act ,
Bayh-Dole Act ,
Central Reexamination Unit (CRU) ,
Ex Partes Reexamination ,
Inter Partes Review (IPR) Proceeding ,
Patent Applications ,
Patent Litigation ,
Patent Ownership ,
Patent Trial and Appeal Board ,
Patent-Eligible Subject Matter ,
Patents ,
USPTO
This month we take a deeper dive into petitions practice for cases handled by the Central Reexamination Unit (CRU). As noted in our previous article, issues of first impression sometimes arise in cases before the CRU where...more
Takeaways:
1. Patent owner statements present both risks and limited opportunities.
2. Waiving the patent owner statement shortens overall reexamination proceeding pendency.
Every third party requester ex parte...more
Takeaways:
- Patentees must demonstrate “unequivocal intent” to broaden claims in a broadening reissue.
- To establish a broadening reissue, a patentee’s actions must align with their words within the two year statutory...more