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An air purifier or air cleaner is a ... John Stenhouse filed two patents applying the absorbent properties of wood charcoal to air purification (patents 19 July ...
John Stenhouse's respirator. John Stenhouse was born in Barrhead in Glasgow on 21 October 1809. He was the eldest son of William Stenhouse, a calico-printer in the family firm of John Stenhouse & Co of 302 High Street, [2] Glasgow, and Elizabeth Currie; [3] he was the only one of their children to survive beyond infancy.
Woodcut of Stenhouse's mask. In 1848, the first US patent for an air-purifying respirator was granted to Lewis P. Haslett [5] for his 'Haslett's Lung Protector,' which filtered dust from the air using one-way clapper valves and a filter made of moistened wool or a similar porous substance. [6]
The delay was attributed by spokesmen for the Patent Office to a combination of a sudden increase in business method patent filings after the 1998 State Street Bank decision, the unfamiliarity of patent examiners with the business and financial arts (e.g., banking, insurance, stock trading etc.), and the issuance of a number of controversial ...
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John Stenhouse (1809–1880), Scottish chemist; John Stenhouse Goldie-Taubman (1838–1898), Manx politician and Speaker of the House of Keys; Joseph Stenhouse (1887–1941), Scottish-born Antarctic navigator; Lawrence Stenhouse (1926–1982), British educational theorist; Mike Stenhouse (born 1958), American baseball player; son of Dave Stenhouse
Two Indian chemical companies have been indicted for allegedly importing ingredients for the highly addictive opioid fentanyl into the United States and Mexico, the U.S. Department of Justice said ...