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:
May. 13, 2025
Filed:
Mar. 20, 2023
3m Innovative Properties Company, St. Paul, MN (US);
Bharat R. Acharya, Woodbury, MN (US);
John A. Wheatley, Stillwater, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
An optical construction includes a first chamber including one or more first walls disposed inside a second chamber including one or more second walls. The first chamber includes a first top and an opposite closed first bottom. The second chamber includes an open second top proximate the open first top and an opposite second bottom proximate the closed first bottom. At least a portion of the one or more second walls includes a plurality of microlayers numbering at least 20 in total. The at least the portion of the one or more second walls faces, and is spaced apart by a non-zero gap from, a corresponding at least a portion of the one or more first walls. The non-zero gap is filled with a material having a lower index of refraction than at least an outermost surface of the at least the portion of the one or more second walls.