Patent US3558450A successfully refreshed from Google Patents.
US3558450A
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Process for electrochemical conversion
Assignee: Phillips Petroleum Co
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Filing: 1968-06-24
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Granted: 1971-01-26
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Expires: 1988-06-24
Abstract
Abstract IN AN ELECTROCHEMICAL PROCESS, THE REACTION TAKES PLACE WITHIN THE CONFINES OF A POROUS ELECTRODE ELEMENT IN WHICH THE PORES OF THE LOWER PORTION HAVE A LOWER EFFECTIVE SIZE THAN THE PORES OF THE UPPER PORTION.
Inventors
- 👤 Benedict H Ashe Jr
- 👤 William V Childs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:50
CPC Classifications
C; C25; C25B; C25B3/00; C25B11/00; C25B11/02; C25B11/03; C25B11/031; C25B3/01; C25B3/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |