Cleaning and liquid contact with solids – Processes – Hollow work – internal surface treatment
Reexamination Certificate
2005-02-01
2005-02-01
El-Arini, Zeinab (Department: 1746)
Cleaning and liquid contact with solids
Processes
Hollow work, internal surface treatment
C134S018000, C134S022110, C134S022180, C134S16600C, C134S16600C, C134S16900A, C134S171000
Reexamination Certificate
active
06848456
ABSTRACT:
A method for the reprocessing of a device having internal passageways by applying a fluid at a plurality of pressures to the internal passageways of the device to permit reuse of the device in a clean environment includes applying a fluid having a single input pressure to a pressure differentiation device having first and second pressure control fittings for providing first and second differing pressure outputs in accordance with the single input pressure and transmitting the fluid at the first and second differing pressures from the pressure differentiation device to the internal passageways. The internal passageways are reprocessed with the transmitted fluid at the first and second differing pressures, whereby the internal passageways are reprocessed at differing pressures in accordance with the single input pressure.
REFERENCES:
patent: 5761069 (1998-06-01), Weber et al.
patent: 5882589 (1999-03-01), Mariotti
patent: 6047431 (2000-04-01), Canonica
Caesar Rivise Bernstein Cohen & Pokotilow Ltd.
Custom Ultrasonics Inc.
El-Arini Zeinab
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