ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,660, issued on April 14.
"Fixative solution and method of preparation of biological sample" was invented by Paul Reardon (Hersham, Great Britain), Robert Reardon (London) and Christopher Fisher (Wokingham, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fixative contains carboxylic acid, preferably acetic acid, for parasitological samples. An exemplary aqueous fixative solution for parasitological samples comprises: a) a C2 to C6 carboxylic acid (preferably acetic acid) at a concentration of 0.5M or greater; and b) a C2 to C6 carboxylate salt or halide salt at a concentration of 0.02M or greater, preferably 0.04M or greater. An optio...