Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-09-04
2007-09-04
Maples, John S. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C454S238000, C236S09200D, C137S505120
Reexamination Certificate
active
10219582
ABSTRACT:
A gas pressure regulator (100) includes a mechanical primary stage (102), preferably including a spring valve, and an electronic secondary stage (104), preferably including a micromachined pressure regulator, the combination of the mechanical primary stage and the electronic secondary stage suitable for relatively precise low pressure near zero flow rates with reasonable energy consumption rates, such as encountered when supplying fuel to a low power fuel cell system.
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Kelley Ronald James
Muthuswamy Sivakumar
Pennisi Robert
Pratt Steven Duane
Bethards Charles W.
Maples John S.
Motorola Inc.
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