US3384656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase esterification of aliphatic alcohols with lower aliphatic acids in the presence of niobium oxide
Assignee: Commercial Solvents Corp
•
Filing: 1965-12-29
•
Granted: 1968-05-21
•
Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Mcmahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:55
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/22; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/16; B01J23/20; C07C67/00; C07C67/08; C07C69/12; C07C69/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE PREPARATION OF ALIPHATIC ESTERS WHICH COMPRISES CONTACTING A GASEOUS MIXTURE CONSISTING ESSENTIALLY OF AN ALIPHATIC CARBOXYLIC ACID OF THE FORMULA RCOOH WHEREIN R IS HYDROGEN OR A LOWER ALKYL RADICAL AND AN ALIPHATIC ALCOHOL OF THE FORMULA R''OH WHEREIN R'' IS A LOWER ALKYL RADICAL WITH A NOBIUM OXIDE CATALYST AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 400*C.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF ALIPHATIC ESTERS WHICH COMPRISES CONTACTING A GASEOUS MIXTURE CONSISTING ESSENTIALLY OF AN ALIPHATIC CARBOXYLIC ACID OF THE FORMULA RCOOH WHEREIN R IS HYDROGEN OR A LOWER ALKYL RADICAL AND AN ALIPHATIC ALCOHOL OF THE FORMULA R''OH WHEREIN R'' IS A LOWER ALKYL RADICAL WITH A NOBIUM OXIDE CATALYST AT A TEMPERATURE OF FROM ABOUT 100 TO ABOUT 400*C.
References Cited (Backward Citations)
US3127375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |