US2884428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing furfural
Assignee: Quaker Oats Co
•
Filing: 1956-12-04
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Granted: 1959-04-28
•
Expires: 1976-12-04
Abstract
No abstract record available.
Inventors
- 👤 Harry C Wamsley
- 👤 Jr Preston A Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:04
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07D307/48; C07D307/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A PROCESS WHEREBY FURFURAL IS PRODUCED BY STEAM DIGESTION OF A PENTOSAN-CONTAINING RAW MATERIAL IN THE PRESENCE OF A NONVOLATILE ACID CATALYST, THE IMPROVEMENT COMPRISING SUBJECTING SAID RAW MATERIAL, PRIOR TO SAID DIGESTION, TO THE CONDITIONS FLOW OF STEAM THERETHROUGH UNDER A STEAM PRESSURE MAINTAINED AT NO GREATER THAN ABOUT 20 POUNDS PER SQUARE INCH GAUGE FOR A TIME PERIOD OF ABOUT 15 TO ABOUT 75 MINUTES, NO SUBSTANTIAL AMOUNT OF FURFURAL BEING FORMED DURING SAID TIME PERIOD.
Claim 2
Dependent Claim
79 words
IN A PROCESS WHEREBY FURFURAL IS PRODUCED BY STEAM DIGESTION OF A PENTOSAN-CONTAINING RAW MATERIAL IN THE PRESENCE OF A NONVOLATILE ACID CATALYST, THE IMPROVEMENT COMPRISING SUBJECTING SAID RAW MATERIAL, PRIOR TO SAID DIGESTION, TO THE CONDITIONS FLOW OF STEAM THERETHROUGH UNDER A STEAM PRESSURE MAINTAINED AT NO GREATER THAN ABOUT 20 POUNDS PER SQUARE INCH GAUGE FOR A TIME PERIOD OF ABOUT 15 TO ABOUT 75 MINUTES, NO SUBSTANTIAL AMOUNT OF FURFURAL BEING FORMED DURING SAID TIME PERIOD.
References Cited (Backward Citations)
US1735084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |