US2701255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic products from lignocellulose
Assignee: Weyerhaeuser Timber Co
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Filing: 1949-07-29
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Granted: 1955-02-01
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Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 Clark C Heritage
- 👤 William G Van Beckum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
THE PROCESS FOR THE TREATMENT OF AN ACID SOLUTION OBTAINED FROM THE TREATMENT OF LIGNOCELLULOSE MATERIAL ORIGINALLY CONTAINING, IN ADDITION TO LIGNIN AND CELLULOSE, OTHER ORGANIC MATERIALS INCLUDING A PHENOLIC COMPONENT AND ACETIC ACID AND FROM WHICH SOLUTION THE LIGNIN AND CELLULOSE HAVE BEEN REMOVED, FOR THE RECOVERY FROM SAID SOLUTION OF SAID PHENOLIC COMPONENT, WHICH COMPRISES ADDING AN ALKALINE REACTING COMPOUND TO SAID SOLUTION TO ESTABLISH A PH VALUE OF APPROXIMATELY 2 TO 4, THEREAFTER TREATING THE SOLUTION WITH A COMPOUND OF LEAD WHOSE ANION DECOMPOSES THEREIN TO FORM WATER WHEREBY LEAD ACETATE IS FORMED BY REACTION WITH SAID LEAD COMPOUND AND THE ACETIC ACID CONTENT OF THE SOLUTION, SAID LEAD ACETATE METATHETICALLY REACTING WITH THE PHENOLIC COMPONENT OF SAID ORGANIC MATERIALS TO FROM INSOLUBLE LEAD SALTS THEREOF, THEREBY REGENERATEING ACETIC ACID FOR FURTHER REACTION WITH SAID LEAD COMPOUND, SAID REGENERATIVE REACTION CONTINUING UNTIL SUBSTANTIALLY QUANTITATIVE RECOVERY OF THE PHENOLIC COMPONENT HAS BEEN OBTAINED, SAID SEPARATING THE PRECIPITATED LEAD SALT OF SAID PHENOLIC MATERIAL TO RECOVER SAME AS ONE PRODUCT.
Claim 2
Dependent Claim
171 words
THE PROCESS FOR THE TREATMENT OF AN ACID SOLUTION OBTAINED FROM THE TREATMENT OF LIGNOCELLULOSE MATERIAL ORIGINALLY CONTAINING, IN ADDITION TO LIGNIN AND CELLULOSE, OTHER ORGANIC MATERIALS INCLUDING A PHENOLIC COMPONENT AND ACETIC ACID AND FROM WHICH SOLUTION THE LIGNIN AND CELLULOSE HAVE BEEN REMOVED, FOR THE RECOVERY FROM SAID SOLUTION OF SAID PHENOLIC COMPONENT, WHICH COMPRISES ADDING AN ALKALINE REACTING COMPOUND TO SAID SOLUTION TO ESTABLISH A PH VALUE OF APPROXIMATELY 2 TO 4, THEREAFTER TREATING THE SOLUTION WITH A COMPOUND OF LEAD WHOSE ANION DECOMPOSES THEREIN TO FORM WATER WHEREBY LEAD ACETATE IS FORMED BY REACTION WITH SAID LEAD COMPOUND AND THE ACETIC ACID CONTENT OF THE SOLUTION, SAID LEAD ACETATE METATHETICALLY REACTING WITH THE PHENOLIC COMPONENT OF SAID ORGANIC MATERIALS TO FROM INSOLUBLE LEAD SALTS THEREOF, THEREBY REGENERATEING ACETIC ACID FOR FURTHER REACTION WITH SAID LEAD COMPOUND, SAID REGENERATIVE REACTION CONTINUING UNTIL SUBSTANTIALLY QUANTITATIVE RECOVERY OF THE PHENOLIC COMPONENT HAS BEEN OBTAINED, SAID SEPARATING THE PRECIPITATED LEAD SALT OF SAID PHENOLIC MATERIAL TO RECOVER SAME AS ONE PRODUCT.
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) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |