Drug – bio-affecting and body treating compositions – Inorganic active ingredient containing – Phosphorus or phosphorus compound
Reexamination Certificate
2005-12-20
2005-12-20
Pryor, Alton (Department: 1616)
Drug, bio-affecting and body treating compositions
Inorganic active ingredient containing
Phosphorus or phosphorus compound
Reexamination Certificate
active
06977088
ABSTRACT:
In the control of pests in gas-tight spaces using gaseous phosphine, concentrated phosphine gas is passed through a phosphine-permeable dividing wall and then immediately combined with air to give phosphine-air mixtures with concentrations below self-ignition limits. Control of pests in gas-tight spaces comprises: (a) providing a source of phosphine (PH3) in concentrated form; (b) conducting the concentrated gaseous phosgene from the source into an air stream through a PH3-permeable dividing wall such that the introduced PH3 is immediately diluted at its point of introduction to below the concentration limits for self-ignition of PH3-air mixtures; and (c) introducing the resulting PH3-air mixture into the space to be fumigated. An Independent claim is also included for an apparatus for performing the method comprising a tube fitted in its central region with at least one gas inlet manifold having a porous or PH3-permeable dividing wall with a flat outlet area; the tube can be combined with inlet and outlet pipes for a pressurized air stream; and the manifold can be combined with a concentrated PH3 gas source.
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“Schalldämpfung pneumatischer Ausrüstungen mit Schalldämpfem”, in: Vyon, Wilhelm Köpp, Zellkautschuk GmbH & Co.
Münzel Martin
Schellhaas Rainer
Day Ursula B.
Feiereisen Henry M.
Pryor Alton
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