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:
Aug. 15, 2023
Filed:
Jun. 28, 2019
Isp Investments Llc, Wilmington, DE (US);
Rob Crohn, Englewood, NJ (US);
Shih Hsiao-Yi, Whippany, NJ (US);
ISP Investments LLC, Wilmington, DE (US);
Abstract
This present disclosure provides a multi-ply radiation dosage indicator, which includes a first ply having two visible readable indicia thereon. The dual radiation sensitive zones are capable of changing opacity in response to exposure radiation. Each radiation sensitive zone can respond to an irradiation dose in tandem or independent of one another. Once the radiation sensitive zone exceeds the design exposure threshold, the visibility of the indicia is altered thereby providing an indication of irradiation exposure. The radiation sensitive zone may either be transparent or opaque and can change its opacity in response to exposure to radiation exceeding a predetermined threshold so as to change the visibility of the indicia.