Patent DE159599C successfully refreshed from Google Patents.
US3134729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolysis of sodium sulfate
Assignee: Individual
•
Filing: 1961-09-29
•
Granted: 1964-05-26
•
Expires: 1981-09-29
Abstract
No abstract record available.
Inventors
- 👤 Kerti Jozsef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:08
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/745; C25; C25B; C25B1/00; C25B1/01; C25B1/14; C25B1/16; C25B1/22; C25B11/00; C25B11/02; C25B11/033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR THE PRODUCTION OF SULFURIC ACID AND CAUSTIC SODA BY THE ELECTROLYTIC DECOMPOSITION OF A SODIUM SULFATE FIRST SOLUTION IN AN ELECTROLYTIC CELL CONTAINING LEAD AND MERCURY ACTIVE ELECTRODES AND A FURTHER ELECTRODE RESISTANT TO SULFURIC ACID, SAID PROCESS COMPRISING THE STEPS OF: (A) IMMERSING SAID LEAD AND MERCURY ELECTRODES IN SAID SOLUTION OF SODIUM SULFATE; (B) ARRANGING SAID LEAD ACTIVE ELECTRODE AS AN ANODE AND SAID MERCURY ACTIVE ELECTRODE AS A CATHODE AND ELECTROLYZING SAID SOLUTION, THEREBY FORMING SODIUM AMALGAM ON SAID MERCURY ELECTRODE AND LEAD SULFATE ON SAID LEAD ELECTRODE;
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PRODUCTION OF SULFURIC ACID AND CAUSTIC SODA BY THE ELECTROLYTIC DECOMPOSITION OF A SODIUM SULFATE FIRST SOLUTION IN AN ELECTROLYTIC CELL CONTAINING LEAD AND MERCURY ACTIVE ELECTRODES AND A FURTHER ELECTRODE RESISTANT TO SULFURIC ACID, SAID PROCESS COMPRISING THE STEPS OF: (A) IMMERSING SAID LEAD AND MERCURY ELECTRODES IN SAID SOLUTION OF SODIUM SULFATE; (B) ARRANGING SAID LEAD ACTIVE ELECTRODE AS AN ANODE AND SAID MERCURY ACTIVE ELECTRODE AS A CATHODE AND ELECTROLYZING SAID SOLUTION, THEREBY FORMING SODIUM AMALGAM ON SAID MERCURY ELECTRODE AND LEAD SULFATE ON SAID LEAD ELECTRODE;
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |