US3158592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacture of furfuryl alcohol condensates
Assignee: Individual
•
Filing: 1961-01-10
•
Granted: 1964-11-24
•
Expires: 1981-01-10
Abstract
No abstract record available.
Inventors
- 👤 Erik R Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:38
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/36; Y; Y10; Y10S; Y10S526/00; Y10S526/908; Y10S526/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF CONDENSING FURFURYL ALCOHOL COMPRISING HEATING FURFURYL ALCOHOL TO A TEMPERATURE EFFECTING VOLATILIZATION OF FURFURYL ALCOHOL, CONTACTING THE FURFURYL ALCOHOL VAPORS WITH GRANULAR ACTIVATED ALUMINA IN A CATALYST ZONE COMMUNICATING WITH BUT SEPARATE FROM THE ZONE OF HEATING OF FURFURYL ALCOHOL AND CONTAINING BETWEEN ABOUT 1% AND ABOUT 20% OF ACTIVATED ALUMINA BY WEIGHT OF THE FURFURYL ALCOHOL BEING HEATED, SAID CATALYST BEING MAINTAINED AT A TEMPERATURE ABOVE ABOUT 250*F., REMOVING FROM THE CATALYST ZONE IN THE FORM OF VAPORS THE WATER SPLIT OUT BY THE INTERMOLECULAR CONDENSATION OF FURFURYL ALCOHOL AND AT LEAST A PORTION OF THE UNREACTED FURFURYL ALCOHOL AND WITHDRAWING A LIQUID PRODUCT OF FURFURYL ALCOHOL CONDENSATION FROM SAID CATALYST ZONE.
Claim 2
Independent Claim
116 words
THE METHOD OF CONDENSING FURFURYL ALCOHOL COMPRISING HEATING FURFURYL ALCOHOL TO A TEMPERATURE EFFECTING VOLATILIZATION OF FURFURYL ALCOHOL, CONTACTING THE FURFURYL ALCOHOL VAPORS WITH GRANULAR ACTIVATED ALUMINA IN A CATALYST ZONE COMMUNICATING WITH BUT SEPARATE FROM THE ZONE OF HEATING OF FURFURYL ALCOHOL AND CONTAINING BETWEEN ABOUT 1% AND ABOUT 20% OF ACTIVATED ALUMINA BY WEIGHT OF THE FURFURYL ALCOHOL BEING HEATED, SAID CATALYST BEING MAINTAINED AT A TEMPERATURE ABOVE ABOUT 250*F., REMOVING FROM THE CATALYST ZONE IN THE FORM OF VAPORS THE WATER SPLIT OUT BY THE INTERMOLECULAR CONDENSATION OF FURFURYL ALCOHOL AND AT LEAST A PORTION OF THE UNREACTED FURFURYL ALCOHOL AND WITHDRAWING A LIQUID PRODUCT OF FURFURYL ALCOHOL CONDENSATION FROM SAID CATALYST ZONE.
References Cited (Backward Citations)
US2681896A
Cited
US2698319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |