Patent US2822729A successfully refreshed from Google Patents.
Patent US2795541A successfully refreshed from Google Patents.
US2795541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic production of percompounds
Assignee: Evonik Operations GmbH
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Filing: 1952-12-22
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Granted: 1957-06-11
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Expires: 1972-12-22
Abstract
No abstract record available.
Inventors
- 👤 Muller Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/28; C25B1/29; C25B11/00; C25B11/02; C25B9/00; C25B9/17; C25B9/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN AN ELECTROLYTIC PROCESS FOR THE PRODUCTION OF A PER-COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERSULFURIC ACID AND ITS SALTS BY THE ANODIC OXIDATION OF AN ANOLYTE CONTAINING SO4 ANIONS IN AN ELECTROLYTE CELL PROVIDED WITH AN ANODE COMPARTMENT BOUNDED BY A RIGID POROUS DIAPHRAGM, THE STEPS WHICH COMPRISE PASSING A COLUMN OF THE ANOLYTE THROUGH A RIGID ELONGATED POROUS TUBE WHICH SURROUNDS AN ELONGATED WIRE SHAPED ANODE ON ALL SIDES, THE INNER SURFACE OF SAID TUBE BEING SPACED FROM SAID WIRE SHAPED ANODE ON ALL SIDES TO LEAVE AN UNOBSTRUCTED SPACE BETWEEN THE WIRE SHAPED ANODE AND SUCH INNER SURFACE OF SAID TUBE, THE COLUMN OF THE ANOLYTE BEING PASSED THROUGH SAID UNOBSTRUCTED SPACE AND THE VOLUME OF SAID TUBE WHEN MEASURED IN CM3 WITH REFERRENCE TO THE INNER SURFACE AREA OF SUCH TUBE WHEN MEASURED IN CM 2 BEARING A RELATIONSHIP OF 1 TO AT LEAST 4, AND SUBJECTING SAID ANOLYTE PASSING THROUGH SAID ELONGATED TUBE
Claim 2
Dependent Claim
159 words
IN AN ELECTROLYTIC PROCESS FOR THE PRODUCTION OF A PER-COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERSULFURIC ACID AND ITS SALTS BY THE ANODIC OXIDATION OF AN ANOLYTE CONTAINING SO4 ANIONS IN AN ELECTROLYTE CELL PROVIDED WITH AN ANODE COMPARTMENT BOUNDED BY A RIGID POROUS DIAPHRAGM, THE STEPS WHICH COMPRISE PASSING A COLUMN OF THE ANOLYTE THROUGH A RIGID ELONGATED POROUS TUBE WHICH SURROUNDS AN ELONGATED WIRE SHAPED ANODE ON ALL SIDES, THE INNER SURFACE OF SAID TUBE BEING SPACED FROM SAID WIRE SHAPED ANODE ON ALL SIDES TO LEAVE AN UNOBSTRUCTED SPACE BETWEEN THE WIRE SHAPED ANODE AND SUCH INNER SURFACE OF SAID TUBE, THE COLUMN OF THE ANOLYTE BEING PASSED THROUGH SAID UNOBSTRUCTED SPACE AND THE VOLUME OF SAID TUBE WHEN MEASURED IN CM3 WITH REFERRENCE TO THE INNER SURFACE AREA OF SUCH TUBE WHEN MEASURED IN CM 2 BEARING A RELATIONSHIP OF 1 TO AT LEAST 4, AND SUBJECTING SAID ANOLYTE PASSING THROUGH SAID ELONGATED TUBE
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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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |