ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,495,797, issued on Dec. 16, was assigned to Rilis Co. Ltd. (Osaka, Japan).
"Insect repellent" was invented by Tsutomu Sugino (Osaka, Japan), Atsushi Henmi (Osaka, Japan), Kenichi Nakamura (Osaka, Japan) and Masakuni Okuhara (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An insect repellent is suitable for an anti-tick treatment to living materials such as bedding and carpets with long-term replacement cycles in years and that also has a tick repellent effect stably lasting over a long period of time. The insect repellent contains 2,4-DHAP or xanthoxyline as an active ingredient. 2,4-DHAP and xanthoxyline can stably maintain repellency rate...