The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jan. 13, 2026

Filed:

Feb. 16, 2023
Applicant:

Indium Corporation, Utica, NY (US);

Inventors:

Craig K. Merritt, Remsen, NY (US);

Anthony D. Lanza, Jr., Rome, NY (US);

James B. Hevel, Orland Park, IL (US);

Assignee:

INDIUM CORPORATION, Utica, NY (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K 35/02 (2006.01); B23K 35/22 (2006.01); B23K 35/26 (2006.01); B23K 101/06 (2006.01); B23K 101/32 (2006.01);
U.S. Cl.
CPC ...
B23K 35/0227 (2013.01); B23K 35/22 (2013.01); B23K 35/262 (2013.01); B23K 2101/06 (2018.08); B23K 2101/32 (2018.08);
Abstract

A solder preform in the shape of a solder tube or washer includes: a cylindrically shaped solder alloy body including an inner surface, an outer surface, a first end, a second end, a first opening located at the first end, and a second opening located at the second end, the second end interlocking with the first end, and the first opening and the second opening cut along an entire height of the solder alloy body; and a flux core embedded in the solder alloy body between the inner surface and the outer surface, the flux core including a thermochromic indicator. During reflow soldering, the flux core including the thermochromic indicator flows out of the first opening of the first end and the second opening of the second end to coat the inner surface of the solder alloy body and the outer surface of the solder alloy body.


Find Patent Forward Citations

Quick Actions:

Merritt, Craig. (2026). Solder preform with internal flux core including thermochromic indicator (U.S. Patent No. 12521821). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12521821

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…