Patent US2554484A successfully refreshed from Google Patents.
US2554484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyanoalkenes
Assignee: EIDP Inc
•
Filing: 1950-06-17
•
Granted: 1951-05-29
•
Expires: 1970-06-17
Abstract
No abstract record available.
Inventors
- 👤 Donald J Loder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:57
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/30
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
THE METHOD FOR PREPARING A CYANOALKENE WHEREIN THE SAID CYANOALKENE IS PRODUCED PRIMARILY BY OXIDIZING A CYANOALKANE IN THE VAPOR PHASE WITH MOLECULAR OXYGEN.
Claim 2
Independent Claim
24 words
THE METHOD FOR PREPARING A CYANOALKENE WHEREIN THE SAID CYANOALKENE IS PRODUCED PRIMARILY BY OXIDIZING A CYANOALKANE IN THE VAPOR PHASE WITH MOLECULAR OXYGEN.
Claim 3
Dependent Claim
31 words
A PROCESS FOR PREPARING ACRYLONITRILE WHEREIN THE ACRYLONTIRILE IS FORMED PRIMARILY BY OXIDIZING PROPIONITRILE IN THE VAPOR PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF A CHROMIUM OXIDEMOLYBDENUM OXIDE-ON-ALUMINUM OXIDE CATALYST.
Claim 4
Dependent Claim
31 words
A PROCESS FOR PREPARING ACRYLONITRILE WHEREIN THE ACRYLONTIRILE IS FORMED PRIMARILY BY OXIDIZING PROPIONITRILE IN THE VAPOR PHASE WITH MOLECULAR OXYGEN IN THE PRESENCE OF A CHROMIUM OXIDEMOLYBDENUM OXIDE-ON-ALUMINUM OXIDE CATALYST.
References Cited (Backward Citations)
FR790262A
Cited
US2384737A
Cited
US2385552A
Cited
US2452505A
Cited
US2412437A
Cited
US2499055A
Cited
US2445693A
Cited
US2481826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |