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:
Oct. 24, 2017
Filed:
Nov. 06, 2014
Seeleaf Inc., Newton, MA (US);
Larry Richard Brown, Newton, MA (US);
Robert David Feeney, Scituate, MA (US);
SeeLeaf Inc., Newton, MA (US);
Abstract
A method, an article and a kit for the detection and visual indication of contact with or exposure to a polyhydroxyaromatic skin irritant found in the sap of a plant is provided herein. The article incorporates a colorless leuco dye that undergoes an instantaneous visible color change when contacted with or exposed to a polyhydroxyaromatic skin irritant in the sap of a plant or on a subject. This color change is an indication that contact with or exposure to a polyhydroxyaromatic skin irritant has occurred. Polyhydroxyaromatic skin irritants found in the sap of plants include those found in poison ivy, poison oak, poison sumac, poison dogwood, mango tree, cashew tree and lacquer tree. The leuco dye of the invention is Pergascript Red I-6B (1(3H)-isobenzofuranone,3,3-bis(2-methyl-1-octyl-1H-indol-3-yl)-).