US2768979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1, 5-pentanediol from furfural
Assignee: EIDP Inc
•
Filing: 1952-07-10
•
Granted: 1956-10-30
•
Expires: 1972-07-10
Abstract
No abstract record available.
Inventors
- 👤 Kenneth O Hambrock
- 👤 James A Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:27
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE METHOD OF CONTINUOUSLY PRODUCING 1,5-PENTANEDIOL WHICH COMPRISES CONTINUOUSLY PASSING LIQUID FURFURAL ADMIXED WITH AN INERT SOLVENT AND HYDROGEN UNDER SUPERATMOSPHERIC PRESSURE THROUGH A FORAMINOUS COBALT CATALYST AT A TEMPERATURE OF ABOUT 125-225* C. AND SUBSEQUENTLY SEPARATING SAID 1,5-PENTANEDIOL FROM THE CRUDE PRODUCT.
Claim 2
Independent Claim
43 words
THE METHOD OF CONTINUOUSLY PRODUCING 1,5-PENTANEDIOL WHICH COMPRISES CONTINUOUSLY PASSING LIQUID FURFURAL ADMIXED WITH AN INERT SOLVENT AND HYDROGEN UNDER SUPERATMOSPHERIC PRESSURE THROUGH A FORAMINOUS COBALT CATALYST AT A TEMPERATURE OF ABOUT 125-225* C. AND SUBSEQUENTLY SEPARATING SAID 1,5-PENTANEDIOL FROM THE CRUDE 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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |