US3007910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treated sulfonated lignin containing materials, and process for producing same
Assignee: Puget Sound Pulp and Timber Co
•
Filing: 1957-11-06
•
Granted: 1961-11-07
•
Expires: 1977-11-06
Abstract
No abstract record available.
Inventors
- 👤 Adolphson Carl
- 👤 King Ellis Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/03; C09K8/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
THE PROCESS OF TREATING SULFONATED LIGNIN CONTAINING MATERIAL OBTAINED FROM A BISULFITE PULPING PROCESS TO PRODUCE USEFUL PRODUCTS THEREFROM, COMPRISING REACTING SUCH SULFONATED LIGNIN CONTAINING MATERIAL IN AQUEOUS SOLUTION WITH A BASIC REAGENT HAVING A HYDROXYL ION CONCENTRATION IN THE SOLUTION CORRESPONDING TO AT LEAST ABOUT PH 10, SAID BASIC REAGENT BEING OF A CHARACTER TO AND BEING PRESENT IN SUFFICIENT AMOUNT TO ESTABLISH AND MAINTAIN THE HYDROXYL ION CONCENTRATION OF THE REACTION WITHIN THE RANGE CORRESPONDING TO FROM ABOUT PH 7 TO ABOUT PH 10 WITHOUT SUBSTANTIAL PRECIPITATION OF ANY OF THE SULFONATED LIGNIN, MAINTAINING THE TEMPERATURE OF THE REACTION IN THE RANGE OF ABOUT 40*C. TO ABOUT 120*C., AND CONTINUING THE REACTION UNTIL SUBSTANTIALLY NO FURTHER DROP IN HYDROXYL ION CONCENTRATION OCCURS.
Claim 2
Dependent Claim
124 words
THE PROCESS OF TREATING SULFONATED LIGNIN CONTAINING MATERIAL OBTAINED FROM A BISULFITE PULPING PROCESS TO PRODUCE USEFUL PRODUCTS THEREFROM, COMPRISING REACTING SUCH SULFONATED LIGNIN CONTAINING MATERIAL IN AQUEOUS SOLUTION WITH A BASIC REAGENT HAVING A HYDROXYL ION CONCENTRATION IN THE SOLUTION CORRESPONDING TO AT LEAST ABOUT PH 10, SAID BASIC REAGENT BEING OF A CHARACTER TO AND BEING PRESENT IN SUFFICIENT AMOUNT TO ESTABLISH AND MAINTAIN THE HYDROXYL ION CONCENTRATION OF THE REACTION WITHIN THE RANGE CORRESPONDING TO FROM ABOUT PH 7 TO ABOUT PH 10 WITHOUT SUBSTANTIAL PRECIPITATION OF ANY OF THE SULFONATED LIGNIN, MAINTAINING THE TEMPERATURE OF THE REACTION IN THE RANGE OF ABOUT 40*C. TO ABOUT 120*C., AND CONTINUING THE REACTION UNTIL SUBSTANTIALLY NO FURTHER DROP IN HYDROXYL ION CONCENTRATION OCCURS.
References Cited (Backward Citations)
US1764601A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |