DARKENING FILTER COMPRISING A NON-UNIFORM PATTERN OF SWITCHABLE SHUTTERS

Number of patents in Portfolio can not be more than 2000

United States of America

APP PUB NO 20250073082A1
SERIAL NO

18950744

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The present disclosure relates to darkening filters 10, 10′ which are suitable for selectively darkening an optically transmissive window 20 for protection from light, in particular from high intensity light. The darkening filter 10, 10′ is mounted in a forward-facing optically transmissive window 20 and comprises a non-uniform pattern 30 of switchable shutters 32 capable of being switching to at least a dark state and a light state by a shutter control system 40. The present disclosure also relates to a method of operating such darkening filters 10, 10′. The present disclosure furthermore relates to vision-protective 10 headgears 100, 100′, welding shields 110 and panes 120 comprising the darkening filters 10, 10′ according to the present disclosure.

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Patent Owner(s)

Patent OwnerAddress
3M INNOVATIVE PROPERTIES COMPANYST PAUL MN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Billingsley, Britton G St. Paul, US 43 571
Donoghue, Claire R Twyford, GB 16 22
Magnusson, Kristina M Djurmo, SE 19 128

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