US3173938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture and separation of isobutyronitrile and isobutyl alcohol
Assignee: Eastman Kodak Co
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Filing: 1962-03-16
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Granted: 1965-03-16
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Expires: 1982-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh J Hagemeyer
- 👤 Statman Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:50
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/32; C07C253/34; C07C253/22; C07C29/00; C07C29/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR SIMULTANEOUSLY PREPARING ISOBUTYRONITRILE AND ISOBUTYL ALCOHOL WHICH COMPRISES CONTACTING AMMONIA AND ISOBUTYL ISOBUTYRATE IN THE VAPOR PHASE IN THE PRESENCE OF $-ALUMINA AS A CATALYST AT A TEMPERATURE OF 350*C. TO 500*C., WHEREIN THE CONTACT TIME RANGES FROM 1.5 TO 12 SECONDS AND WHEREIN THE MOLE RATIO OF AMMONIA TO ISBUTYL ISOBUTYRATE RANGES FROM ABOUT 0.8:1.0 TO ABOUT 4:1.
Claim 2
Dependent Claim
62 words
A PROCESS FOR SIMULTANEOUSLY PREPARING ISOBUTYRONITRILE AND ISOBUTYL ALCOHOL WHICH COMPRISES CONTACTING AMMONIA AND ISOBUTYL ISOBUTYRATE IN THE VAPOR PHASE IN THE PRESENCE OF $-ALUMINA AS A CATALYST AT A TEMPERATURE OF 350*C. TO 500*C., WHEREIN THE CONTACT TIME RANGES FROM 1.5 TO 12 SECONDS AND WHEREIN THE MOLE RATIO OF AMMONIA TO ISBUTYL ISOBUTYRATE RANGES FROM ABOUT 0.8:1.0 TO ABOUT 4:1.
References Cited (Backward Citations)
US2369061A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |