US 12,221,717 B2
Method for creating a chromium-plated surface with a matte finish
Jordi Reichert, Plettenberg (DE)
Assigned to KINGS MOUNTAIN INTERNATIONAL, INC., Kings Mountain, NC (US)
Filed by Kings Mountain International, Inc., Kings Mountain, NC (US)
Filed on Apr. 3, 2023, as Appl. No. 18/130,263.
Application 18/130,263 is a continuation of application No. 17/234,329, filed on Apr. 19, 2021, granted, now 11,643,747.
Application 17/234,329 is a continuation of application No. 16/230,264, filed on Dec. 21, 2018, granted, now 10,982,344, issued on Apr. 21, 2021.
Application 16/230,264 is a continuation of application No. 15/729,187, filed on Oct. 10, 2017, granted, now 10,208,392, issued on Feb. 19, 2019.
Claims priority of provisional application 62/546,060, filed on Aug. 16, 2017.
Prior Publication US 2023/0295830 A1, Sep. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C25D 3/08 (2006.01); C23F 1/26 (2006.01); C25D 3/04 (2006.01); C25D 5/00 (2006.01); C25D 5/02 (2006.01); C25D 5/14 (2006.01); C25D 5/48 (2006.01); C25D 17/00 (2006.01); C25D 21/12 (2006.01); C25F 3/08 (2006.01); C25F 7/00 (2006.01)
CPC C25F 3/08 (2013.01) [C23F 1/26 (2013.01); C25D 3/04 (2013.01); C25D 3/08 (2013.01); C25D 5/022 (2013.01); C25D 5/14 (2013.01); C25D 5/48 (2013.01); C25D 5/605 (2020.08); C25D 5/627 (2020.08); C25D 17/005 (2013.01); C25D 17/007 (2013.01); C25D 21/12 (2013.01); C25F 7/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of creating, on a substrate, a chrome-plated surface having a matte finish, comprising:
controlling a resistance of a current bridge circuit by (i) controlling a resistance of a chromium bath; (ii) controlling a temperature of the chromium bath; (iii) controlling a distance between the substrate and one or more terminals positioned in the chromium bath; and/or (iv) controlling a resistance of a resistor of the current bridge circuit;
depositing a first chromium layer on the substrate, the substrate being positioned in the chromium bath, wherein the first chromium layer is deposited by supplying current from a power source, the power source being electrically connected to the substrate and the chromium bath; and
etching the first chromium layer by engaging a current bridge, the current bridge, when engaged, forming an electrical connection that closes the current bridge circuit, the current bridge circuit comprising the current bridge, the substrate, and the chromium bath.