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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.:

US 11969368 B1

PDFFull Text
Date of Patent:
Apr. 30, 2024

Filed:

Jul. 07, 2022

Lumen stent and preform thereof, and methods for preparing the lumen stent and preform thereof

Applicant:

Biotyx Medical (Shenzhen) Co., Ltd., Guangdong, CN;

Inventors:

Deyuan Zhang, Shenzhen, CN;

Xianmiao Chen, Shenzhen, CN;

Wenjiao Lin, Shenzhen, CN;

Xiangdong Liu, Shenzhen, CN;

Assignee:

BIOTYX MEDICAL (SHENZHEN) CO., LTD., Shenzhen, CN;

Attorney:

Raymond Sun

Primary Examiner:

Seema Mathew

Int. Cl.
CPC ...
A61F 2/82 (2013.01); A61L 27/04 (2006.01); A61L 31/02 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/14 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C23C 8/02 (2006.01); C23C 8/26 (2006.01); B21C 1/00 (2006.01); B21C 1/24 (2006.01);
U.S. Cl.
CPC ...
A61F 2/82 (2013.01); A61L 27/04 (2013.01); A61L 31/02 (2013.01); A61L 31/022 (2013.01); C21D 8/105 (2013.01); C21D 9/08 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/14 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C23C 8/02 (2013.01); C23C 8/26 (2013.01); A61F 2240/001 (2013.01); B21C 1/00 (2013.01); B21C 1/003 (2013.01); B21C 1/24 (2013.01);
Abstract

A lumen stent preform is provided using a plasma nitriding technology, a preparation method thereof, a method for preparing a lumen stent by using the preform, and a lumen stent obtained according to the method. The preform is manufactured by using pure iron or an iron alloy containing no strong nitrogen compound, has a hardness of 160-250HV0.05/10, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. Alternatively, the preform is an iron alloy containing a strong nitrogen compound, and has a microstructure that is a deformed structure having a grain size scale greater than or equal to 9 or a deformed structure after cold machining. The lumen stem preform meets the requirements of a conventional stent for radial strength and plasticity, so that plasma nitriding is applicable to commercial preparation of a lumen stent.

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