Thursday, August 1, 2019

Oh, patents! KnoNap


Copyright © Françoise Herrmann

KnoNap short for “the napkin that knows” is a napkin designed to detect the presence of 26 drugs in a class of 40 psychoactive drugs called benzodiazepines, including Valium, Rohypnol and Zanax. Such drugs have sedative, hypnotic (sleep-inducing), anxiolytic (anti-anxiety), anticonvulsant, and muscle relaxant properties, which combined with alcohol have potentially fatal effects. Such class of drugs are also known as the drugs of choice used for “date rape” and more generally “drug-facilitated assault”.   

The KnoNap looks just like a real cocktail napkin, on which the user places just a small drop of his or her drink. When the drink is spiked, the napkin will immediately detect the presence of a drug by changing color on a small spot, in the close vicinity of the drop.

The KnoNap invention is disclosed in the PCT WIPO patent application WO2018222750A1 titled Integrated devices for rapid detection of benzodiazepines or other drugs in solution. The invention arises out one of the inventor’s own unfortunate experience with date rape abroad. 

Honored in 2018 as one of the Toyota Mothers of Invention, Danya Sherman took action following her plight. She developed the KnoNap, founded the KnoNap company, tirelessly canvassing campuses and other venues to advocate for victims, and to educate and empower others with this method of self-defense against drug-assisted assault. The KnoNap was developed as a portable test kit that is easy to use and interpret, discreet and reliable. Designed within a napkin, the test kit is also purposefully gender-neutral so that both men and women might use it, in a variety of social settings.


The patent discloses the chemical reactions and reagents of the rapid drug-assaying system which comprises an absorbent sample pad for the drop of the drink and a reaction chamber in fluid communication with the sample pad. The reaction chamber comprises an acidic layer, an ion exchange resin layer, an absorbent reaction pad, and a viewing pad infused with a colorimetric reagent. The assaying system might be placed at one or several corners of the napkin or in any other multiple zones.

The abstract of this invention is included below, together with the Figure 1 drawing of the patent. Figure 1 depicts the KnoNap 100 with its top 101 and bottom 104 tissue paper layers, the test zone 102 and an impermeable layer 103. In some embodiments, an extra test zone 102 is included between the bottom layer 104 and the impermeable layer 103. 
Integrated devices for rapid detection of benzodiazepines or other drugs in solution are provided. In various embodiments, a test device comprises a reaction chamber having an input port and an output port, the reaction chamber having translucent walls — having a thickness; a hydrophihc sample pad disposed at the input port; an acidic layer disposed within the reaction chamber and in fluid communication with the sample pad; an ion exchange resin layer disposed within the reaction chamber and in fluid communication with the acidic layer; a hydrophihc reaction pad disposed within the reaction chamber and in fluid communication with the ion exchange resin layer, the hydrophilic reaction pad being infused with a hydrolyzing and/or reducing reagent; a viewing pad disposed at the output port and in fluid communication with the reaction pad, the viewing pad extending along the thickness of the reaction chamber walls, the viewing pad being infused with at least one colorimetric reagent. [Abstract WO2018222750A1]


In the drive to prevent drug-assisted assault, marketing of the KnoNap napkins is targeting individual consumers, and all social settings, including bars and restaurants, as well as college campuses.  

Pun intended KnoNap prevents forced  “napping”.

References
KnoNap
Toyota MOI (Mother of Invention) Danya Sherman
Ritschel, C.  (01-29-2018) KnoNap: Napkin capable of detecting drugs in drinks invented by Washington DC student

1 comment:

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