US2880216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating a crude composition obtained from bark into its component parts
Assignee: Individual
•
Filing: 1956-10-29
•
Granted: 1959-03-31
•
Expires: 1976-10-29
Abstract
No abstract record available.
Inventors
- 👤 Burgon William James
- 👤 Columbia British
- 👤 Zenczak Piotr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
A METHOD OF PROCESSING A CRUDE COMPOSITION OBTAINED FROM BARK, COMPRISING TREATING THE COMPOSITION IN A SOLUTION OF BARK EXTRACTING ALCOHOL AND AN ALKALI METAL HYDROXIDE SO AS TO CONVERT THE COMPOSITION TO ALKALINE FORM, REMOVING THE LIQUID AND RECOVERING A DRY CRUDE SALT, EXTRACTING THE CRUDE SALT WITH A HYDROCARBON SOLVENT SELECTED FROM THE GROUP CONSISTING OF HEXANE AND BENZENE TO REMOVING THE SOLVENT SOLUBLES, DISSOLVING THE EXTRACTED CRUDE IN HOT WATER, COOLING THE AQUEOUS SOLUTION AND THEREBY CAUSING A PRECIPITATE TO BE FORMED, SEPARATING THE PRECIPITATE AND THEREBY RECOVERING SALT OF LIGNOCERIC ACID AS A PRECIPITATE.
References Cited (Backward Citations)
US2662893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |