| Application number | Title of the application | Filing Date | Status |
|---|
| 07/923317 | OXYGEN CONCENTRATION UTILIZING ELECTROCHEMICAL CELL | Jul 30, 1992 | Abandoned |
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| 07/896902 | CATHODE PROTECTION | Jun 10, 1992 | Abandoned |
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| 07/886535 | PROCESS FOR REMOVAL OF SULFUR DIOXIDE FROM WASTE GASES | May 19, 1992 | Abandoned |
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