Number | Name | Date | Kind |
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3431182 | Frant | Mar 1969 | |
3563874 | Ross et al. | Feb 1971 | |
3960523 | Ryan | Jun 1976 |
Entry |
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Converse; J. G. et al., "Ion-Selective Electrode Analyzer for Monitoring Gaseous Hydrogen Chloride", ISA Transactions, vol. 15, No. 3, 1976, pp. 220-226. |
Prior Art Public Use by Aluminum Company of America is discussed on p. 2 of patent specification. |