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:
Nov. 26, 2024
Filed:
May. 19, 2020
3m Innovative Properties Company, St. Paul, MN (US);
Claire R. Donoghue, Twyford, GB;
Britton G. Billingsley, St. Paul, MN (US);
Kristina M. Magnusson, Djurmo, SE;
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The present disclosure relates to darkening filters' which are suitable for selectively darkening an optically transmissive windowfor protection from light, in particular from high intensity light. The darkening filter′ is mounted in a forward-facing optically transmissive windowand comprises a non-uniform patternof switchable shutterscapable of being switching to at least a dark state and a light state by a shutter control system. The present disclosure also relates to a method of operating such darkening filters′. The present disclosure furthermore relates to vision-protective headgears′, welding shieldsand panescomprising the darkening filters′ according to the present disclosure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile