US3250691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process of decomposing an alkali metal chloride
Assignee: PPG Industries Inc
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Filing: 1962-05-28
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Granted: 1966-05-10
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Thorowgood Taylor Broun
- 👤 Howard H Hoekje
- 👤 Martinsons Aleksandrs
- 👤 Paul P Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:09
CPC Classifications
C; C25; C25B; C25B15/00; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/075; C25B11/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE ELECTROLYSIS OF AN AQUEOUS ALKALI METAL CHLORIDE SOLUTION IN AN ALKALI-CHLORINE CELL HAVING A PLATINUM SURFACE ANODE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID ANODE WITH AN ELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF AQUEOUS SOLUTIONS OF ALKALI METAL SALTS AND ALKALINE EARTH METAL SALTS, ELECTROLYZING SAID ELECTROLYTE WHILE USING SAID ANODE AS A CATHODE, SUBSEQUENTLY EMPLOYING SAID PLATINUM SURFACE ANODE SO CONTACTED IN AN ALKALICHLORINE CELL AS AN ANODE THEREIN, PROVIDING AN AQUEOUS ALKALI METAL CHLORIDE SOLUTION IN SAID ALKALI-CHLORINE CELL, ELECTROLYZING SAID ALKALI METAL CHLORIDE SOLUTION BY PASSING CURRENT THROUGH SAID ALKALI-CHLORINE CELL WHILE MAINTAINING THE PH OF SAID ALKALI METAL CHLORIDE SOLUTION AT BELOW 5.
Claim 2
Dependent Claim
109 words
IN THE ELECTROLYSIS OF AN AQUEOUS ALKALI METAL CHLORIDE SOLUTION IN AN ALKALI-CHLORINE CELL HAVING A PLATINUM SURFACE ANODE, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID ANODE WITH AN ELECTROLYTE SELECTED FROM THE GROUP CONSISTING OF AQUEOUS SOLUTIONS OF ALKALI METAL SALTS AND ALKALINE EARTH METAL SALTS, ELECTROLYZING SAID ELECTROLYTE WHILE USING SAID ANODE AS A CATHODE, SUBSEQUENTLY EMPLOYING SAID PLATINUM SURFACE ANODE SO CONTACTED IN AN ALKALICHLORINE CELL AS AN ANODE THEREIN, PROVIDING AN AQUEOUS ALKALI METAL CHLORIDE SOLUTION IN SAID ALKALI-CHLORINE CELL, ELECTROLYZING SAID ALKALI METAL CHLORIDE SOLUTION BY PASSING CURRENT THROUGH SAID ALKALI-CHLORINE CELL WHILE MAINTAINING THE PH OF SAID ALKALI METAL CHLORIDE SOLUTION AT BELOW 5.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |