US2779770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of furfural by preferential absorption of the vapor on solids
Assignee: EIDP Inc
•
Filing: 1954-02-23
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Granted: 1957-01-29
•
Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Oliver W Cass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:32
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
69 words
IN THE MANUFACTURE OF FURFURAL BY THE HYDROLYSIS OF A REACTION MIXTURE OF ACIDIFIED VEGETABLE MATTER CONTAINING PENTOSANS AND RECOVERY OF THE FURFURAL THEREFROM BY STEAM DISTILLATION, THE STEPS COMPRISING PASSING THE RESULTANT VAPOR MIXTURE OF STEAM AND FURFURAL THROUGH A SUITABLE SOLID ABSORBENT FOR FURFURAL AT A TEMPERATURE OF ABOUT 100*-130*C. AND THEREBY ABSORBING THE FURFURAL FROM THE STEAM AND SUBSEQUENTLY RECOVERING THE FURFURAL FROM THE SOLID ABSORBENT.
Claim 2
Dependent Claim
69 words
IN THE MANUFACTURE OF FURFURAL BY THE HYDROLYSIS OF A REACTION MIXTURE OF ACIDIFIED VEGETABLE MATTER CONTAINING PENTOSANS AND RECOVERY OF THE FURFURAL THEREFROM BY STEAM DISTILLATION, THE STEPS COMPRISING PASSING THE RESULTANT VAPOR MIXTURE OF STEAM AND FURFURAL THROUGH A SUITABLE SOLID ABSORBENT FOR FURFURAL AT A TEMPERATURE OF ABOUT 100*-130*C. AND THEREBY ABSORBING THE FURFURAL FROM THE STEAM AND SUBSEQUENTLY RECOVERING THE FURFURAL FROM THE SOLID ABSORBENT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |