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Cat Food Composition for Treating Urolithiasis and Reducing Hairballs

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Summary

The USPTO published patent application US20260090571A1 for a cat food composition targeting urolithiasis (urinary stones) and hairball reduction. Inventors Nolan Z. Frantz, Angela M. Gajda, and Todd Harper developed wet and dry formulations incorporating omega-3 sources (flaxseed, fish oil), acidifiers (calcium sulfate, SAPP), methionine, taurine, and dietary fiber to achieve urine pH between 6.15-6.85 and reduce RSS struvite to ≤1.8 and RSS oxalate to ≤6.0.

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What changed

The USPTO published patent application US20260090571A1 filed September 5, 2025 (Application No. 19319905), covering a cat food composition for treating or preventing urolithiasis while reducing hairball incidence. The composition combines omega-3 fatty acids from flaxseed and fish oil with pH-modifying agents (calcium sulfate, potassium sulfate, methionine, SAPP, taurine) and dietary fiber. Target parameters include urine pH of 6.15-6.85, RSS struvite ≤1.8, and RSS oxalate ≤6.0.

This is a patent application for intellectual property protection, not a regulatory requirement. Pet food manufacturers and pet food ingredient suppliers may review the application to understand potential competitive landscape developments. No compliance deadlines, penalties, or regulatory obligations are associated with this publication.

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Apr 2, 2026

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← USPTO Patent Applications

Cat Food Composition for Treating or Preventing Urolithiasis and for Reducing the Incidence of Hairballs

Application US20260090571A1 Kind: A1 Apr 02, 2026

Inventors

Nolan Z. Frantz, Angela M. Gajda, Todd Harper

Abstract

A cat food composition comprises ingredients that work to manage hairball formation as well as urine pH and urine saturation levels to treat or prevent urolithiasis. In some embodiments, a wet cat food composition comprises flaxseed, fish oil, calcium sulfate, methionine, sodium acid pyrophosphate (SAPP) and a source of dietary fiber. In some embodiments, a dry cat food composition comprises fish oil, methionine, taurine, potassium sulfate and a source of dietary fiber. Flaxseed and/or fish oil provide omega-3 fatty acids to minimize urolith formation. Calcium sulfate, potassium sulfate, taurine, methionine and/or SAPP help achieve an ideal urine pH between 6.15 and 6.85. The source of dietary fiber helps reduce the incidence of hairballs. In some embodiments, the cat food composition is configured to establish an average RSS struvite value less than or equal to 1.8, and/or an average RSS oxalate less than or equal to 6.0.

CPC Classifications

A23K 10/30 A23K 10/22 A23K 20/142 A23K 20/24 A23K 20/26 A23K 50/40 A61K 9/0056 A61K 31/198 A61K 33/06 A61K 33/42 A61K 35/60 A61K 36/55 A61P 13/12

Filing Date

2025-09-05

Application No.

19319905

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Last updated

Classification

Agency
USPTO
Published
April 2nd, 2026
Instrument
Notice
Legal weight
Non-binding
Stage
Draft
Change scope
Minor
Document ID
US20260090571A1

Who this affects

Applies to
Pet food manufacturers Retailers Consumers
Industry sector
3114 Food & Beverage Manufacturing 4411 Retail Trade
Geographic scope
United States US

Taxonomy

Primary area
Food Safety
Operational domain
Legal
Topics
Consumer Protection Product Safety

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