US2935524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta-methyleneaminopropionitrile and its conversion to beta-alanine
Assignee: Nopco Chemical Co
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Filing: 1957-12-20
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Granted: 1960-05-03
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Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Knox
- 👤 George A Bernotsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:56
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR OBTAINING B-METHYLENEAMINOPROPIONITRILE COMPRISING THE STEPS OF ADMIXING AT A TEMPERATURE OF FROM -10*C. TO 20*C. IN AQUEOUS SOLUTION FORMALDEHYDE, AMMONIA AND ACRYLONITRILE IN A MOL RATIO OF FROM 1:1:1: TO 2:2:1, ALLOWING THE TEMPERATURE OF THE RESULTING MIXTURE TO SLOWLY RISE TO A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO 75*C. AND RECOVERING THE RESULTING B-METHYLENEAMINOPROPIONITRILE.
Claim 2
Dependent Claim
59 words
A PROCESS FOR OBTAINING B-METHYLENEAMINOPROPIONITRILE COMPRISING THE STEPS OF ADMIXING AT A TEMPERATURE OF FROM -10*C. TO 20*C. IN AQUEOUS SOLUTION FORMALDEHYDE, AMMONIA AND ACRYLONITRILE IN A MOL RATIO OF FROM 1:1:1: TO 2:2:1, ALLOWING THE TEMPERATURE OF THE RESULTING MIXTURE TO SLOWLY RISE TO A TEMPERATURE OF FROM ABOUT ROOM TEMPERATURE TO 75*C. AND RECOVERING THE RESULTING B-METHYLENEAMINOPROPIONITRILE.
References Cited (Backward Citations)
US2139088A
Cited
US2783267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |