Defendant
1 case as defendant.
Underlayment Specialties Plus, LLC (USP) is a small, privately held building-materials company based in Harleysville, Pennsylvania (mailing address 805 W 5th St., Unit 10A, Lansdale, PA), with a New Hampshire LLC registration dated May 5, 2009. It describes itself as a certified Veteran-Owned Small Business and an independent company, not a division of a larger corporation. Third-party business data (SignalHire, Prospeo) lists 1–10 employees and estimated annual revenue of roughly $1–10M; those figures are unverified estimates, not audited or company-confirmed numbers.
Products / operations. USP supplies synthetic roofing underlayments and water-protection materials to the North American roofing market through roofing distributors, metal-roof fabricators and building-material dealers. Its named lines include RoofTopGuard II Premium synthetic underlayment, Roofers Choice II Synfelt, RoofTopGuard SA high-temperature self-adhesive ice-and-water protector, Ice Protect Plus, Petex-15 contractor-grade synthetic underlayment, and AirOutShield breathable wall/roof membranes. It is an operating company, not a shell or licensing vehicle.
Patent-litigation posture. The case data show 1 tracked case, all as a defendant and none as a plaintiff — the profile of an operating company on the receiving end of an infringement suit rather than an NPE. The single tracked matter is Kirsch Research & Development, LLC v. Underlayment Specialties Plus, LLC, filed 2020-04-24 and recorded in the Western District of Pennsylvania; docket records elsewhere list it as E.D. Pa. No. 2:20-cv-02023.
Context. Plaintiff Kirsch Research & Development, LLC (Simi Valley, CA; affiliated with Kirsch Building Products/Sharkskin underlayments) launched a broad 2020 campaign against roughly a dozen roofing manufacturers and distributors, coupled with an ITC Section 337 investigation (Inv. No. 337-TA-1202) asserting U.S. Patent 8,765,251, alongside district-court suits asserting the '482 and '251 patents. USP was among the defendants. Related proceedings elsewhere ended unfavorably for Kirsch: the ITC action was withdrawn after an unfavorable claim construction, and the asserted claims were invalidated in IPR, a result affirmed by the Federal Circuit in May 2024 (Kirsch v. GAF Materials). Those later outcomes concerned other defendants and are not evidence of the merits of the USP matter, which is not further detailed in our data.
Kirsch asserted the '482 patent against Underlayment Specialties Plus. The docket lists the cause as 15 U.S.C. § 1126, and the outcome was not confirmed.