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N.D. Cal.Procedural orderFiled June 6, 2025

Feng v. Tripp

Judge
Jon Tigar
Docket
4:24-cv-07539
Court
U.S. District Court · Northern District of California
Pages
5
Civil ProcedureMotion to DismissPreliminary Injunction
In one sentence

In Feng v. Tripp, Judge Tigar granted Tripp’s motion to dismiss with prejudice for lack of jurisdiction and denied Feng’s preliminary-injunction and Administrative Procedure Act review motions.

Who this affects

Yvonne Ya-Wen Feng’s claims were dismissed with prejudice for lack of subject-matter jurisdiction. Robert K. Tripp’s motion to dismiss was granted, Feng’s preliminary-injunction and Administrative Procedure Act review motions were denied, and the file was closed.

What happened

In Feng v. Tripp, Yvonne Ya-Wen Feng alleged that pharmaceutical companies and FBI personnel were conspiring to attack her and interfere with her medical invention, patents, and immigration matters. She brought claims under federal laws and constitutional amendments and requested a preliminary injunction and review of immigrant visa denials.

Robert K. Tripp moved to dismiss the amended complaint. The court ruled that Feng’s allegations were too implausible to create federal subject-matter jurisdiction under the substantiality doctrine. Because it lacked jurisdiction, the court did not decide whether her legal claims were otherwise valid.

Judge Jon S. Tigar granted Tripp’s motion to dismiss with prejudice, denied Feng’s motions for a preliminary injunction and Administrative Procedure Act review, and directed the Clerk to close the file.

The detailed version

For law students, journalists, and other readers who want the full reasoning

Case
Feng v. Tripp · No. 4:24-cv-07539
Judge
Jon Tigar
Date
June 6, 2025

Background

Yvonne Ya-Wen Feng filed an amended complaint against Robert K. Tripp, appearing in his official capacity, and a defendant identified as “Doe.” Feng alleged that she had invented and patented a non-invasive medical therapy using magnetic devices. She further alleged that pharmaceutical companies, working with FBI personnel and others, were trying to stop her from practicing and patenting the invention. Her allegations included claims of attacks, poisoning, radiation exposure, stalking, interference with patent filings, interference with immigration-law assistance, and falsified medical records.

Feng asserted claims under the Racketeer Influenced and Corrupt Organizations Act, several federal civil-rights statutes, defamation law, and the First, Fourth, and Fourteenth Amendments. She also filed motions for a preliminary injunction and for written judicial review under the Administrative Procedure Act concerning immigrant visa denials.

Jurisdictional ruling

Tripp moved to dismiss under Federal Rule of Civil Procedure 12(b)(1), which permits dismissal when the court lacks subject-matter jurisdiction. The court applied the substantiality doctrine. Under that doctrine, federal courts lack power to hear claims that are so implausible, frivolous, or lacking in merit that they do not present a genuine federal controversy.

The court held that Feng’s allegations of a conspiracy involving pharmaceutical companies and “FBI mobs,” including alleged attacks with radiation and poisons and a staged scooter accident, were too insubstantial to create federal subject-matter jurisdiction. Because the court found that it lacked jurisdiction, it did not consider Tripp’s alternative arguments about the merits of Feng’s claims.

The court also determined that amendment would be futile and therefore did not grant leave to amend. It stated that, after dismissing the claims for lack of jurisdiction under the substantiality doctrine, it had no power to make rulings about the merits.

Other motions and disposition

Because the case was dismissed for lack of subject-matter jurisdiction, the court denied as moot Feng’s motions for a preliminary injunction and for Administrative Procedure Act review. In its conclusion, the court stated that Tripp’s motion to dismiss was granted with prejudice, Feng’s motions were denied, and the Clerk was directed to close the file.

The authoritative version

Read the full 5-page opinion on CourtListener, the free public archive maintained by the Free Law Project.

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