Patent FR771379A successfully refreshed from Google Patents.
Patent US2823178A successfully refreshed from Google Patents.
US2823178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating sulphite waste
Assignee: Individual
•
Filing: 1956-03-05
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Granted: 1958-02-11
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Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 John J Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:58
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE PROCESS OF TREATING LIGNIN AND ITS ASSOCIATED PRODUCTS WHICH HAVE RESULTED FROM THE REACTIONS UNDERGONE IN THE SULPHITE METHOD OF PAPER PULP MANUFACTURE FOR THE PERPOSE OF DEOXIDIZING SUCH PRODUCTS, WHICH COMPRISES ADDING AN ALKALI IN SUFFICIENT QUANTITY TO THE SULPHITE WASTE SOLUTION TO CAUSE A VISIBLE DISCOLORED SUSPENSION AND A SLIGHT PRECIPITATE, AND THEN SUBJECTING THE ALKALINED SULPHITE WASTE TO ELECTROLYSIS AT NOT LESS THAN TWO VOLTS BETWEEN A POSITIVE ELECTRODE OF HIGH ELECTROMOTIVE FORCE AND A HYDROGEN EVOLVING NEGATIVE ELECTRODE IN A SINGLE COMPARTMENT IN WHICH BOTH ELECTRODES ARE IN DIRECT AND INTIMATE CONTACT WITH THE SULPHITE WASTE PRODUCTS, WHEREBY THE OXYGEN CONCENTRATED AT THE POSITIVE ELECTRODE UNDER ELECTROLYTIC PRESSURE IS NEUTRALIZED BY THE IONIC PRODUCTS OF THE DISSOLVING POSITIVE ELECTRODE AND THE NASCENT HYDROGEN IONIC PRODUCTS EMANATING FROM THE NEGATIVE ELECTRODE THEREBY EFFECTING A REDUCTION IN THE CONDITION OF THE LIGNIN AND ITS ASSOCIATED PRODUCTS.
Claim 2
Dependent Claim
149 words
THE PROCESS OF TREATING LIGNIN AND ITS ASSOCIATED PRODUCTS WHICH HAVE RESULTED FROM THE REACTIONS UNDERGONE IN THE SULPHITE METHOD OF PAPER PULP MANUFACTURE FOR THE PERPOSE OF DEOXIDIZING SUCH PRODUCTS, WHICH COMPRISES ADDING AN ALKALI IN SUFFICIENT QUANTITY TO THE SULPHITE WASTE SOLUTION TO CAUSE A VISIBLE DISCOLORED SUSPENSION AND A SLIGHT PRECIPITATE, AND THEN SUBJECTING THE ALKALINED SULPHITE WASTE TO ELECTROLYSIS AT NOT LESS THAN TWO VOLTS BETWEEN A POSITIVE ELECTRODE OF HIGH ELECTROMOTIVE FORCE AND A HYDROGEN EVOLVING NEGATIVE ELECTRODE IN A SINGLE COMPARTMENT IN WHICH BOTH ELECTRODES ARE IN DIRECT AND INTIMATE CONTACT WITH THE SULPHITE WASTE PRODUCTS, WHEREBY THE OXYGEN CONCENTRATED AT THE POSITIVE ELECTRODE UNDER ELECTROLYTIC PRESSURE IS NEUTRALIZED BY THE IONIC PRODUCTS OF THE DISSOLVING POSITIVE ELECTRODE AND THE NASCENT HYDROGEN IONIC PRODUCTS EMANATING FROM THE NEGATIVE ELECTRODE THEREBY EFFECTING A REDUCTION IN THE CONDITION OF THE LIGNIN AND ITS ASSOCIATED PRODUCTS.
References Cited (Backward Citations)
US2318919A
Cited
US2743220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |