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. 15, 1994
Filed:
Oct. 26, 1993
William H Dickerson, Baltimore, MD (US);
Other;
Abstract
A portable device for calculating the optimal safe sun protection factor (SPF) lotion to be applied by the user under local ambient conditions. The user inputs their skin type (fair, medium, or dark), and the amount of time they wish to spend in the sun. The apparatus then calculates a corresponding SPF number when the ultraviolet (UV) radiation sensing means is exposed to the existing impinging light conditions. A timer is set which allows the user to be notified when the predetermined amount of exposure time has been reached. The device includes a photovoltaic (PV) cell for self power having a battery back-up if ambient light conditions, and thus the generated photovoltaic output, falls beneath a predetermined threshold.