US3069334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of tetraethyl lead
Assignee: Individual
•
Filing: 1958-06-09
•
Granted: 1962-12-18
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Karl
- 👤 Lehmkuhl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:30
CPC Classifications
C; C25; C25B; C25B3/00; C25B3/01; C25B3/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN THE PROCESS FOR THE ELECTROLYTIC PRODUCTION OF TETRAETHYL LEAD BY PASSING AN ELECTROLYSIS CURRENT BETWEEN A CATHODE AND LEAD CONTAINING ANODE THROUGH AN ALUMINUM TRIETHYL CONTAINING ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES MAINTAINING A DIAPHRAGM BETWEEN THE CATHODE AND ANODE TO THEREBY FORM SEPARATE CATHODE AND ANODE SPACES AN AT LEAST INITIALLY MAINTAINING AS THE ELECTROLYTE IN SAID ANODE SPACE AN ANOLYTE ESSENTIALLY CONSISTING OF NAAI(C2H5)4 AND NAF.AI(C2H5)3, SAID NAAI(C2H5)4 AND NAF.A1(C2H5)3 BEING PRESENT IN SUBSTANTIALLY EQUIVALENT AMOUNTS, SAID DIAPHRAMG SUBSTANTIALLY PREVENTING MIGRATION OF ELECTROLYTE BETWEEN THE CATHODE AND ANODE SPACE WITHOUT SUBSTANTIALLY INTERFERING WITH THE PASSAGE OF SAID CURRENT.
Claim 2
Dependent Claim
100 words
IN THE PROCESS FOR THE ELECTROLYTIC PRODUCTION OF TETRAETHYL LEAD BY PASSING AN ELECTROLYSIS CURRENT BETWEEN A CATHODE AND LEAD CONTAINING ANODE THROUGH AN ALUMINUM TRIETHYL CONTAINING ELECTROLYTE, THE IMPROVEMENT WHICH COMPRISES MAINTAINING A DIAPHRAGM BETWEEN THE CATHODE AND ANODE TO THEREBY FORM SEPARATE CATHODE AND ANODE SPACES AN AT LEAST INITIALLY MAINTAINING AS THE ELECTROLYTE IN SAID ANODE SPACE AN ANOLYTE ESSENTIALLY CONSISTING OF NAAI(C2H5)4 AND NAF.AI(C2H5)3, SAID NAAI(C2H5)4 AND NAF.A1(C2H5)3 BEING PRESENT IN SUBSTANTIALLY EQUIVALENT AMOUNTS, SAID DIAPHRAMG SUBSTANTIALLY PREVENTING MIGRATION OF ELECTROLYTE BETWEEN THE CATHODE AND ANODE SPACE WITHOUT SUBSTANTIALLY INTERFERING WITH THE PASSAGE OF SAID CURRENT.
References Cited (Backward Citations)
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US2844615A
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US2849349A
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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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |