US2650236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of furans
Assignee: Phillips Petroleum Co
•
Filing: 1951-04-17
•
Granted: 1953-08-25
•
Expires: 1971-04-17
Abstract
No abstract record available.
Inventors
- 👤 Francis E Condon
- 👤 Edward E Burgoyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:32
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR PREPARING A FURAN WHICH PROCESS COMPRISES CONTACTING, AT A TEMPERATURE IN THE RANGE 250* TO 500* C., AN ACETYLENIC DIOL CONTAINING FROM 4 TO 10 CARBON ATOMS PER MOLECULE WITH A CATALYST CONSISTING ESSENTIALLY OF COBALT MOLYBDATE SUPPORTED ON POROUS ALUMINA, THE TWO HYDROXYL GROUPS OF SAID DIOL BEING THREE CARBON ATOMS REMOTE FROM EACH OTHER AND THE TRIPLE BOND BEING INTERMEDIATE THE TWO HYDROXYL-SUBSTITUTED CARBONS, AND RECOVERING SAID FURAN AS THE CHIEF PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
80 words
A PROCESS FOR PREPARING A FURAN WHICH PROCESS COMPRISES CONTACTING, AT A TEMPERATURE IN THE RANGE 250* TO 500* C., AN ACETYLENIC DIOL CONTAINING FROM 4 TO 10 CARBON ATOMS PER MOLECULE WITH A CATALYST CONSISTING ESSENTIALLY OF COBALT MOLYBDATE SUPPORTED ON POROUS ALUMINA, THE TWO HYDROXYL GROUPS OF SAID DIOL BEING THREE CARBON ATOMS REMOTE FROM EACH OTHER AND THE TRIPLE BOND BEING INTERMEDIATE THE TWO HYDROXYL-SUBSTITUTED CARBONS, AND RECOVERING SAID FURAN AS THE CHIEF PRODUCT OF THE PROCESS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |