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.
Patent No.:
Date of Patent:
Jun. 18, 2024
Filed:
Oct. 01, 2021
Applicant:
Comadur SA, Le Locle, CH;
Inventors:
Alexandra Amherd-Hidalgo, Neuchatel, CH;
Alexis Boulmay, Morteau, FR;
Pierry Vuille, Les Emibois, CH;
Assignee:
Comadur SA, Le Locle, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 14/48 (2006.01); C22C 38/00 (2006.01); C23C 14/02 (2006.01); C23C 14/06 (2006.01); C23C 14/08 (2006.01); G04D 3/00 (2006.01); H01F 1/057 (2006.01); H01F 41/02 (2006.01);
U.S. Cl.
CPC ...
C23C 14/48 (2013.01); C22C 38/005 (2013.01); C23C 14/021 (2013.01); C23C 14/028 (2013.01); C23C 14/0641 (2013.01); C23C 14/085 (2013.01); G04D 3/0097 (2013.01); H01F 1/057 (2013.01); H01F 41/026 (2013.01); C22C 2202/02 (2013.01);
Abstract
A method for protecting a neodymium-iron-boron watch magnet against corrosion is provided. The method includes a sandblasting treatment of the watch magnet surface following by an ion implantation in an oxygen plasma or a nitrogen plasma to obtain an impervious surface layer with all of the surface bonds saturated by the implanted ions acting as a barrier against oxidation and preventing corrosion of the watch magnet in a humid environment, under the usual conditions for wearing watches.