Gas fumigation method and system
US6615534B1 · kind B1 · utility
6Cited by
31References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1999 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jul 30, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01M17/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and system are disclosed for fumigating at least one region with a nonflammable gaseous mixture including phosphine. A sensor senses the concentration of phosphine for atmosphere of the region and a flow controller controls flow to the region in response to the sensed concentration. A recycling passage removes a portion of the atmosphere from the region and returns the atmosphere to create a recycle flow through the region. In addition, a gas mixing system is provided to supply the non-flammable mixture by mixing phosphine from a phosphine source and an inert substance from an inert substance source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.