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:
Aug. 14, 2018
Filed:
Mar. 24, 2014
Nivarox-far S.a., Le Locle, CH;
Christian Charbon, Chezard-St-Martin, CH;
Guido Plankert, Boppelsen, CH;
Nivarox-FAR S.A., Le Locle, CH;
Abstract
A timepiece spring, as a mainspring, made of austenitic stainless steel including a base formed of iron and chromium, thickness of the spring being less than 0.20 mm, and the spring including, by mass: chromium: minimum value 15%, maximum value 25%; manganese: minimum value 5%, maximum value 25%; nitrogen: minimum value 0.40%, maximum value 0.75%; carbon: minimum value 0.10%, maximum value 1.00%; the total (C+N) carbon and nitrogen content between 0.40% and 1.50% by mass; the carbon-to nitrogen ratio (C/N) by mass between 0.125 and 0.550; impurities and additional metals with the exception of iron: minimum value 0%, maximum value 12.0%; iron: the complement to 100%.