US2957028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-phase process for the production of 2, 2-dialkyl-4-pentenals
Assignee: Eastman Kodak Co
•
Filing: 1958-06-18
•
Granted: 1960-10-18
•
Expires: 1978-06-18
Abstract
No abstract record available.
Inventors
- 👤 Kent C Brannock
- 👤 Charles W Hargis
- 👤 Howard S Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:00
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/21; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A VAPOR-PHASE PROCESS OF PREPARING 2,2-DIMETHYL-4PENTENAL, WHICH COMPRISES PASSING A GASEOUS MIXTURE OF ALLYL ALCOHOL AND ISOBUTYRALDEHYDE, IN A MOLAR RATIO OF O.5:1 TO 4:1 ALDEHYDE TO ALCOHOL, OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED CARBON AND SILICA GEL, AT A TEMPERATURE OF 175*C. TO 250*C., AT A SPACE VELOCITY OF 150 TO 500 CATALYST VOLUMERS PER HOUR.
Claim 2
Dependent Claim
61 words
A VAPOR-PHASE PROCESS OF PREPARING 2,2-DIMETHYL-4PENTENAL, WHICH COMPRISES PASSING A GASEOUS MIXTURE OF ALLYL ALCOHOL AND ISOBUTYRALDEHYDE, IN A MOLAR RATIO OF O.5:1 TO 4:1 ALDEHYDE TO ALCOHOL, OVER A CATALYST SELECTED FROM THE GROUP CONSISTING OF ACTIVATED CARBON AND SILICA GEL, AT A TEMPERATURE OF 175*C. TO 250*C., AT A SPACE VELOCITY OF 150 TO 500 CATALYST VOLUMERS PER HOUR.
References Cited (Backward Citations)
US2501144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |