Patent US2935504A successfully refreshed from Google Patents.
US2935504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of improving the effectiveness of the components of spent sulfite liquor andthe products thereof
Assignee: Puget Sound Pulp and Timber Co
•
Filing: 1955-10-10
•
Granted: 1960-05-03
•
Expires: 1975-10-10
Abstract
No abstract record available.
Inventors
- 👤 King Ellis Gray
- 👤 Adolphson Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A TWO-CHEMICAL PROCESS OF PRODUCING USEFUL PRODUCTS FROM SULFONATED LIGNIN CONTAINING MATERIAL COMPRISING REACTING SULFONATED LIGNIN CONTAINING MATERIAL TO FORM A SALT OF SAID SULFONATED LIGNIN CONTAINING MATERIAL HAVING A CATION SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM, CHROMIUM, AND COPPERS, AND COMBINATION THEREOF, AND OXIDIZING THE SAID SALT OF THE SULFONATED LIGNIN CONTAINING MATERIAL FOAMING A SOLUBLE PRODUCT BY AN OXIDIZING AGENT HAVING AN OXIDIZING POWER STRONGER THAN AN OXIDATION POTENTIAL OF ABOUT -1.3.
Claim 2
Dependent Claim
76 words
A TWO-CHEMICAL PROCESS OF PRODUCING USEFUL PRODUCTS FROM SULFONATED LIGNIN CONTAINING MATERIAL COMPRISING REACTING SULFONATED LIGNIN CONTAINING MATERIAL TO FORM A SALT OF SAID SULFONATED LIGNIN CONTAINING MATERIAL HAVING A CATION SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM, CHROMIUM, AND COPPERS, AND COMBINATION THEREOF, AND OXIDIZING THE SAID SALT OF THE SULFONATED LIGNIN CONTAINING MATERIAL FOAMING A SOLUBLE PRODUCT BY AN OXIDIZING AGENT HAVING AN OXIDIZING POWER STRONGER THAN AN OXIDATION POTENTIAL OF ABOUT -1.3.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |