Appeal No. 96-0251
Application 07/874,697
THE INVENTION
Appellants’ claimed invention is directed toward methods
for extending the service life of an implantable sensor having
a corrodible reference electrode, at least one noble metal
cathodic working electrode, and at least one noble metal
anodic counter electrode maintained at low impedance, by 1)
reversing the polarization of electrodes in a recited manner;
2) using multiple electrodes with only one of the electrodes
being operative at any time; 3) applying a continuous cathodic
current to the reference electrode; or 4) increasing the input
impedance at the reference electrode and shielding the
reference electrode. Claims 3, 7, 9 and 10 are illustrative
and are appended to this decision.
THE REFERENCES
Krebs 2,508,523 May 23,
1950
Perley 2,563,062 Aug. 7,
1951
Hersch 2,805,191 Sep. 3,
1957
Sabins 2,998,371 Aug. 29,
1961
Dahms 3,458,421 Jul. 29,
1969
Joseph Y. Lucisano et al., “In Vitro Stability of an Oxygen
2
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