US2684982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of levulinic acid
Assignee: Quaker Oats Co
•
Filing: 1951-11-19
•
Granted: 1954-07-27
•
Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Andrew P Dunlop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR RECOVERING LEVULINIC ACID FROM AN AQUEOUS SOLUTION WHICH COMPRISES EXTRACTING SAID AQUEOUS SOLUTION WITH FURFURAL.
Claim 2
Dependent Claim
18 words
A PROCESS FOR RECOVERING LEVULINIC ACID FROM AN AQUEOUS SOLUTION WHICH COMPRISES EXTRACTING SAID AQUEOUS SOLUTION WITH FURFURAL.
References Cited (Backward Citations)
US1995965A
Cited
US2018031A
Cited
US2165438A
Cited
CH208747A
Cited
US2255235A
Cited
US2257389A
Cited
GB583533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |