Patent US2719178A successfully refreshed from Google Patents.
US2719178A
Expired / Lapsed
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Vapor phase method of producing n-substituted acrylamides
Assignee: Eastman Kodak Co
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Filing: 1953-01-07
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Granted: 1955-09-27
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Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Jr Newton H Shearer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A METHOD OF PRODUCING N-PHENYLACRYLAMIDE WHICH COMPRISES HEATING N-PHENYL-B-N-ANILINOPROPIONAMIDE IN THE VAPOR PHASE IN THE PRESENCE OF ALUMINA AT A TEMPERATURE WITHIN THE RANGE OF 300-550* C. FOR A REACTION PERIOD OF LESS THAN ABOUT TEN SECONDS.
Claim 2
Dependent Claim
11 words
A CONTINUOUS METHOD FOR PRODUCING AN N-SUBSTITUTED ACRYLAMIDE OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |