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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 11766314 B1

PDFFull Text
Date of Patent:
Sep. 26, 2023

Filed:

Feb. 09, 2023

Methods for making multilayer dental aligners

Applicant:

Align Technology, Inc., San Jose, CA (US);

Inventors:

Chunhua Li, Cupertino, CA (US);

Yan Chen, Cupertino, CA (US);

Heinz Pudleiner, Krefeld, DE;

Klaus Meyer, Dormagen, DE;

Joerg Nickel, Dormagen, DE;

Craig Pehlert, Lenox, MA (US);

Assignee:

Align Technology, Inc., San Jose, CA (US);

Attorney:

Wilson Sonsini Goodrich & Rosati

Primary Examiner:

Vivian Chen

Int. Cl.
CPC ...
A61C 7/08 (2006.01); B32B 27/28 (2006.01); B32B 7/022 (2019.01); B32B 25/08 (2006.01); B32B 25/20 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01); B29C 51/14 (2006.01); B32B 25/14 (2006.01); A61C 13/00 (2006.01); A61F 5/56 (2006.01); A61C 19/06 (2006.01); A61C 7/00 (2006.01); A63B 71/08 (2006.01); B29K 67/00 (2006.01); B29K 75/00 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
A61C 7/08 (2013.01); B29C 51/14 (2013.01); B32B 7/022 (2019.01); B32B 25/08 (2013.01); B32B 25/20 (2013.01); B32B 27/08 (2013.01); B32B 27/281 (2013.01); B32B 27/285 (2013.01); B32B 27/286 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); B32B 27/40 (2013.01); A61C 7/00 (2013.01); A61C 13/00 (2013.01); A61C 19/06 (2013.01); A61F 5/56 (2013.01); A63B 71/085 (2013.01); B29K 2067/00 (2013.01); B29K 2075/00 (2013.01); B29K 2995/007 (2013.01); B29K 2995/0026 (2013.01); B29K 2995/0077 (2013.01); B29K 2995/0082 (2013.01); B29L 2031/753 (2013.01); B32B 25/14 (2013.01); B32B 27/283 (2013.01); B32B 27/30 (2013.01); B32B 27/302 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2250/40 (2013.01); B32B 2274/00 (2013.01); B32B 2307/40 (2013.01); B32B 2307/412 (2013.01); B32B 2307/50 (2013.01); B32B 2307/51 (2013.01); B32B 2307/536 (2013.01); B32B 2307/54 (2013.01); B32B 2307/546 (2013.01); B32B 2319/00 (2013.01); B32B 2323/00 (2013.01); B32B 2323/04 (2013.01); B32B 2323/10 (2013.01); B32B 2323/16 (2013.01); B32B 2333/04 (2013.01); B32B 2367/00 (2013.01); B32B 2371/00 (2013.01); B32B 2375/00 (2013.01); B32B 2377/00 (2013.01); B32B 2383/00 (2013.01); B32B 2535/00 (2013.01); B32B 2555/00 (2013.01); Y10T 428/31551 (2015.04); Y10T 428/31565 (2015.04); Y10T 428/31786 (2015.04);
Abstract

A multilayer sheet comprising first and second layers is provided. The first layer consists of a co-polyester. The second layer consists of a thermoplastic polyurethane elastomer having an elongation at break of greater than 200%, a hardness of 60A to 85D, an ultimate tensile strength of greater than about 5000 psi, and a light transmission between 400 nm and 800 nm of greater than about 75%. A mold is provided and the multilayer sheet is thermoformed over the mold to form a plurality of tooth-receiving cavities configured to receive and reposition a patient's teeth from a first arrangement toward a second arrangement. Excess material is trimmed from the thermoformed multilayer sheet to form a multilayer dental aligner.

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