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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 11553996 B1

PDFFull Text
Date of Patent:
Jan. 17, 2023

Filed:

Aug. 22, 2018

Radiation curable compositions and composite articles made using an additive manufacturing process

Applicant:

3m Innovative Properties Company, St. Paul, MN (US);

Inventors:

Zeba Parkar, Marietta, GA (US);

James D. Hansen, White Bear Lake, MN (US);

Tianyu Wu, St. Paul, MN (US);

Carsten Franke, St. Paul, MN (US);

Timothy D. Dunbar, Woodbury, MN (US);

Gregory A. Kobussen, Woodbury, MN (US);

Ahmed S. Abuelyaman, Woodbury, MN (US);

Bradley D. Craig, Lake Elmo, MN (US);

Assignee:

3M Innovative Properties Company, St. Paul, MN (US);

Attorney:

Adrian L. Pishko

Primary Examiner:

Jessica Whiteley

Int. Cl.
CPC ...
C08K 7/16 (2006.01); C08F 2/46 (2006.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01); A61C 13/00 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B29C 64/124 (2017.01); A61K 6/887 (2020.01); A61K 6/17 (2020.01); C08F 222/10 (2006.01); C08K 3/36 (2006.01); C08K 9/02 (2006.01); B33Y 70/10 (2020.01); B33Y 80/00 (2015.01); B29K 509/02 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
A61C 13/0013 (2013.01); A61C 13/0004 (2013.01); A61K 6/17 (2020.01); A61K 6/887 (2020.01); B29C 64/124 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/10 (2020.01); C08F 222/102 (2020.02); C08F 222/1025 (2020.02); C08F 222/1067 (2020.02); C08K 3/36 (2013.01); C08K 9/02 (2013.01); B29K 2509/02 (2013.01); B29L 2031/7536 (2013.01); B33Y 80/00 (2014.12); C08F 222/1065 (2020.02);
Abstract

A radiation curable composition including at least one radiation hardenable component, a photo-initiator, and a filler material having a population of particulates in an amount greater than or equal to 50% by weight of the printable composition. The population of particulates exhibits a median diameter (D50) of greater than or equal to 0.3 micrometer on a volume-average basis as determined using the Particle Size Test Method, and the radiation curable composition exhibits a viscosity of less than or equal to 150 Pa s when measured using the Viscosity Test Method. A method, apparatus, and systems for producing composite articles by selectively exposing a portion of the radiation curable composition to a source of actinic radiation to at least partially cure the exposed portion of the radiation curable composition, thereby forming a hardened layer, preferably by an additive manufacturing process such as stereophotolithography, are also described. The composite articles may include composite dental restorations.

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