Patent US3017338A successfully refreshed from Google Patents.
US3017338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process and apparatus
Assignee: Diamond Shamrock Corp
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Filing: 1958-03-03
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Granted: 1962-01-16
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence A Butler
- 👤 Jr Christopher C Silsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:01
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/34; C25B1/46
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
THE METHOD OF PRODUCING ALKALI METAL HYDROXIDE COMPRISING PASSING AN AQUEOUS SOLUTION OF AN ALKALI METAL HALIDE INTO THE ANODE COMPARTMENT OF A THREE-COMPARTMENT ELECTROLYTIC CELL HAVING AN ANODE COMPARTMENT SEPARATED FROM THE CENTER COMPARTMENT BY A FLUID PERMEABLE POROUS DIAPHRAGM AND THE CENTER COMPARTMENT SEPARATED FROM THE CATHODE COMPARTMENT BY A CATION PERMSELECTIVE MEMBRANE, MAINTAINING A GREATER HYDRAULIC PRESSURE IN THE ANODE COMPARTMENT THAN IN THE CENTER COMPARTMENT, THUS CAUSING SAID ALKALI METAL HALIDE SOLUTION TO FLOW FROM THE ANODE COMPARTMENT THROUGH SAID POROUS DIAPHRAGM INTO THE CENTER COMPARTMENT, INTRODUCING WATER INTO THE CATHODE COMPARTMENT, PASSING A DIRECT CURRENT THROUGH SAID COMPARTMENTS TO CAUSE MIGRATION OF CATIONS FROM THE CENTER COMPARTMENT INTO THE CATHODE COMPARTMENT, WITHDRAWING AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE FROM THE CATHODE COMPARTMENT, WITHDRAWING AN AQUEOUS SOLUTION OF A MIXTURE OF AN ALKALI METAL HYDROXIDE AN ALKALE METAL HALIDE FROM THE CENTER COMPARTMENT, AND RECOVERING THE HALOGEN OF SAID HALIDE FROM THE ANODE COMPARTMENT.
Claim 2
Independent Claim
159 words
THE METHOD OF PRODUCING ALKALI METAL HYDROXIDE COMPRISING PASSING AN AQUEOUS SOLUTION OF AN ALKALI METAL HALIDE INTO THE ANODE COMPARTMENT OF A THREE-COMPARTMENT ELECTROLYTIC CELL HAVING AN ANODE COMPARTMENT SEPARATED FROM THE CENTER COMPARTMENT BY A FLUID PERMEABLE POROUS DIAPHRAGM AND THE CENTER COMPARTMENT SEPARATED FROM THE CATHODE COMPARTMENT BY A CATION PERMSELECTIVE MEMBRANE, MAINTAINING A GREATER HYDRAULIC PRESSURE IN THE ANODE COMPARTMENT THAN IN THE CENTER COMPARTMENT, THUS CAUSING SAID ALKALI METAL HALIDE SOLUTION TO FLOW FROM THE ANODE COMPARTMENT THROUGH SAID POROUS DIAPHRAGM INTO THE CENTER COMPARTMENT, INTRODUCING WATER INTO THE CATHODE COMPARTMENT, PASSING A DIRECT CURRENT THROUGH SAID COMPARTMENTS TO CAUSE MIGRATION OF CATIONS FROM THE CENTER COMPARTMENT INTO THE CATHODE COMPARTMENT, WITHDRAWING AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE FROM THE CATHODE COMPARTMENT, WITHDRAWING AN AQUEOUS SOLUTION OF A MIXTURE OF AN ALKALI METAL HYDROXIDE AN ALKALE METAL HALIDE FROM THE CENTER COMPARTMENT, AND RECOVERING THE HALOGEN OF SAID HALIDE FROM THE ANODE COMPARTMENT.
Claim 3
Dependent Claim
146 words
A THREE-COMPARTMENT ELECTROLYTIC APPARATUS FOR PRODUCING ALKALI METAL HYDROXIDE COMPRISING AN ANODE COMPARTMENT, A CENTER COMPARTMENT, AND A CATHODE COMPARTMENT, THE ANODE COMPARTMENT BEING SEPARATED FROM THE CENTER COMPARTMENT BY A POROUS NON-SELECTIVE DIAPHRAGM, THE CENTER COMPARTMENT BEING SEPARATED FROM THE CATHODE COMPARTMENT BY A CATION PERMSELECTIVE MEMBRANE, SAID MEMBRANE COMPRISING A SOLID POLYMERIC STURCTURE REINFORCED BY AN EMBEDDED NON-CORRODIBLE MATERIAL, INLET MEANS FOR PASSING ALKALI METAL CHLORIDE BRINE INTO THE ANODE COMPARTMENT, MEANS FOR MAINTAINING A PRESSURE IN THE ANODE COMPARTMENT GREATER THAN THE PRESSURE IN THE CENTER COMPARTMENT TO EFFECT THE TRANSFER OF SAID ALKALI METAL CHLORIDE BRINE THROUGH SAID POROUS DIAPHRAGM INTO SAID CENTER COMPARTMENT, MEANS FOR PASSING AN AQUEOUS ELECTROLYTE SOLUTION INTO THE CATHODE CHAMBER, MEANS FOR PASSING A DIRECT CURRENT TRANSVERSELY THROUGH SAID COMPARTMENTS, AND OUTLET MEANS FOR WITHDRAWING AQUEOUS SOLUTIONS OF ALKALI METAL HYDROXIDE FROM THE CATHODE AND CENTER COMPARTMENTS.
Claim 4
Dependent Claim
146 words
A THREE-COMPARTMENT ELECTROLYTIC APPARATUS FOR PRODUCING ALKALI METAL HYDROXIDE COMPRISING AN ANODE COMPARTMENT, A CENTER COMPARTMENT, AND A CATHODE COMPARTMENT, THE ANODE COMPARTMENT BEING SEPARATED FROM THE CENTER COMPARTMENT BY A POROUS NON-SELECTIVE DIAPHRAGM, THE CENTER COMPARTMENT BEING SEPARATED FROM THE CATHODE COMPARTMENT BY A CATION PERMSELECTIVE MEMBRANE, SAID MEMBRANE COMPRISING A SOLID POLYMERIC STURCTURE REINFORCED BY AN EMBEDDED NON-CORRODIBLE MATERIAL, INLET MEANS FOR PASSING ALKALI METAL CHLORIDE BRINE INTO THE ANODE COMPARTMENT, MEANS FOR MAINTAINING A PRESSURE IN THE ANODE COMPARTMENT GREATER THAN THE PRESSURE IN THE CENTER COMPARTMENT TO EFFECT THE TRANSFER OF SAID ALKALI METAL CHLORIDE BRINE THROUGH SAID POROUS DIAPHRAGM INTO SAID CENTER COMPARTMENT, MEANS FOR PASSING AN AQUEOUS ELECTROLYTE SOLUTION INTO THE CATHODE CHAMBER, MEANS FOR PASSING A DIRECT CURRENT TRANSVERSELY THROUGH SAID COMPARTMENTS, AND OUTLET MEANS FOR WITHDRAWING AQUEOUS SOLUTIONS OF ALKALI METAL HYDROXIDE FROM THE CATHODE AND CENTER COMPARTMENTS.
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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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |