The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2002
Filed:
May. 18, 1999
Colin Joseph Waterford, McGregor, AU;
Robert Gordon Winks, Nambour, AU;
Commonwealth Scientific and Industrial Research Organisation, Australian Capital Territory, AU;
Abstract
A formulation for use in the controlled generation of phosphine comprises a mixture of a particulate phosphide and a water-immiscible compound. The water-immiscible compound is paraffin oil, petroleum jelly, a mixture of these materials or a wax having a melting point in the range 35° C. to 65° C. The phosphide comprises from 65 to 85 per cent (by weight) of the formulation. Such a formulation can be added progressively to water in a reaction chamber. Alternatively, the formulation can be packaged in a water-impermeable container from which a region can be removed to expose the formulation to water vapor in a gas flowing past the container. The water or the water vapor reacts with the phosphide particles as they become exposed to form phosphine. The phosphine, mixed with a carrier (usually air), may be fed into a duct connected to a grain silo, for fumigation of grain stored in the silo.