US3095409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid treated sulfonated lignin-containing material and process for the production thereof
Assignee: Puget Sound Pulp and Timber Co
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Filing: 1960-04-01
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Granted: 1963-06-25
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Expires: 1980-04-01
Abstract
No abstract record available.
Inventors
- 👤 King Ellis Gray
- 👤 Adolphson Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:14
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/203; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A PROCESS FOR PREPARING USEFUL PRODUCTS FROM SULFONATED LIGNIN-CONTAINING MATERIAL COMPRISING THE STEP OF FORMING A WATER SOLUBLE SALT OF AN ACID POLYMERIZED SULFONATED LIGNIN-CONTAINING MATERIAL, SAID SALT HAVING A CATION SELECTED FROM THE GROUP CONSISTING OF IRON, ALUMINUM CHROMIUM, COPPER AND COMBINATIONS THEREOF, AND OXIDIZING SAID SALT WITH 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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |