On December 18, 1900, Cleophas Monjeau filed a patent for an apparatus for purifying water. The three-tiered filter was made up of vegetation on top, sand in the middle and gravel on the bottom. For this invention, Cleophas dMonjeau was honored and made a member of the Parisian Academy of Inventors.
Marines using a similar method to purify water at the Jungle Warfare Training Center.
Publication number: US681884 A
Patent Title: Purifying water
Publication type: Grant
Publication date: 3 Sep 1901
Filing date: 18 Dec 1900
Priority date: 18 Dec 1900
Publication number: US 681884 A, US 681884A, US-A-681884, US681884 A, US681884A
Inventors: Cleophas Monjeau
Original Assignee: Cleophas Monjeau