Patent US2541127A successfully refreshed from Google Patents.
US2541127A
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Process for producing dehydroperillic acid
Assignee: Weyerhaeuser Timber Co
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Filing: 1948-06-17
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Granted: 1951-02-13
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Expires: 1968-06-17
Abstract
No abstract record available.
Inventors
- 👤 William G Van Beckum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:57
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0007; C; C08; C08H; C08H6/00; C07; C07G; C07G1/00; C08H8/00; D21C3/00; D21C3/02; D21C3/04; D21C3/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PRODUCTION OF DEHYDROPERILLIC ACID AND LIGNIN PRODUCTS FROM WOOD, WHICH COMPRISES TREATING COMMINUTED WOOD WHICH IS A SOURCE MATERIAL FOR SAID ACID AND LIGNIN WITH AN AQUEOUS SOLUTION OF AN ALKALI METAL HYDROXIDE AT A TEMPERATURE OF FROM ABOUT NORMAL ROOM TEMPERATURE TO THE BOILING POINT OF SAID SOLUTION AT ATMOSPHERIC PRESSURE AND IN CONCENTRATION SUFFICIENT TO PROVIDE NOT SUBSTANTIALLY MORE THAN ABOUT 15 PARTS OF SAID ALKALI METAL HYDROXIDE PER 100 PARTS OF DRY WOOD FOR A TIME PERIOD SUFFICIENT SUBSTANTIALLY TO EXHAUST THE ACTION OF THE SAID SOLUTION FOR FORMING AN EXTRACTED MASS OF WOOD AND AN AQUEOUS ALKALINE EXTRACT CONTAINING DE-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |