US3336209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reducing the excess voltage in electrolysis of aqueous hydrochloric acid in diaphragm cells
Assignee: Hoechst AG
•
Filing: 1964-10-06
•
Granted: 1967-08-15
•
Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Hirschberg Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:26
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A PROCESS FOR REDUCING THE HYDROGEN OVERVOLTAGE IN THE ELECTOLYSIS OF AQUEOUS HYDROCHLORIC ACID IN DIAPHRAGM CELLS TO FORM HYDROGEN AND CHLORINE BY THE ADDITION OF METAL SALTS TO THE ELECTROLYTE, THE IMPROVEMENT WHEREIN SAID METAL SALT IS A SALT OF PALLADIUM ADDED IN AN AMOUNT PROVIDING FROM 0.2 TO 2 GRAMS OF PALLADIUM PER SQUARE METER OF ACTIVE ELECTRODE SURFACE.
Claim 2
Dependent Claim
62 words
IN A PROCESS FOR REDUCING THE HYDROGEN OVERVOLTAGE IN THE ELECTOLYSIS OF AQUEOUS HYDROCHLORIC ACID IN DIAPHRAGM CELLS TO FORM HYDROGEN AND CHLORINE BY THE ADDITION OF METAL SALTS TO THE ELECTROLYTE, THE IMPROVEMENT WHEREIN SAID METAL SALT IS A SALT OF PALLADIUM ADDED IN AN AMOUNT PROVIDING FROM 0.2 TO 2 GRAMS OF PALLADIUM PER SQUARE METER OF ACTIVE ELECTRODE SURFACE.
References Cited (Backward Citations)
US2666024A
Cited
US3129152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |