US2917537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Its esters
Assignee: —
•
Filing: —
•
Granted: 1959-12-15
•
Expires: 1976-12-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:07
CPC Classifications
C; C07; C07C; C07C67/00; C07C59/00; C07C59/185; C07C69/00; C07C69/66; C07C69/67; C07C69/716
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR PRODUCING ESTERS OF LEVULINIC ACID, REACTING A CARBONHYDRATE WITH A MIXTURE OF A LOWER ALKANOL AND A NONREACTING DILUENT SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS, CHLORINATED HYDROCARBONS, ESTERS AND ETHERS WHOSE BOILING POINTS AT ATMOSPHERIC PRESSURE DO NOT EXCEED ABOUT 190*C., AT TEMPERATURE ON THE ORDER OF 150*C TO 250*C., AND IN THE PRESSURE OF A STRONG SAID CATALYST, SAID NONREACTING DILUENT BEING CHARACTERIZED BY A HEAT OF VAPORIZATION AT THE BOILING POINT SUBSTANTIALLY LESS THAN THAT OF THE ALKANOL, EXTRACTING HE LEVULINATE ESTER FORMED BY SAID REACTION FROM THE REACTION MIXTURE, AND THEREAFTER DISTILLING THE LEVULINATE ESTER PRODUCT.
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR PRODUCING ESTERS OF LEVULINIC ACID, REACTING A CARBONHYDRATE WITH A MIXTURE OF A LOWER ALKANOL AND A NONREACTING DILUENT SELECTED FROM THE GROUP CONSISTING OF HYDROCARBONS, CHLORINATED HYDROCARBONS, ESTERS AND ETHERS WHOSE BOILING POINTS AT ATMOSPHERIC PRESSURE DO NOT EXCEED ABOUT 190*C., AT TEMPERATURE ON THE ORDER OF 150*C TO 250*C., AND IN THE PRESSURE OF A STRONG SAID CATALYST, SAID NONREACTING DILUENT BEING CHARACTERIZED BY A HEAT OF VAPORIZATION AT THE BOILING POINT SUBSTANTIALLY LESS THAN THAT OF THE ALKANOL, EXTRACTING HE LEVULINATE ESTER FORMED BY SAID REACTION FROM THE REACTION MIXTURE, AND THEREAFTER DISTILLING THE LEVULINATE ESTER 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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |