US2852553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitrosophenylaminoacid esters
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-10-28
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Granted: 1958-09-16
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Expires: 1975-10-28
Abstract
No abstract record available.
Inventors
- 👤 Amico John J D
- 👤 Ching C Tung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:01
CPC Classifications
C; C07; C07C; C07C227/00; C07C227/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE PROCESS OF PREPARING NITROSOPHENYLALAMINE ESTERS WHICH COMPRISES TREATING BETA-ANILINOPROPIONITRILE WITH NITROUS ACID IN COLD ANHYDROUS ALCOHOLIC SOLUTION OF HYDROGEN CHLORIDE.
Claim 2
Dependent Claim
21 words
THE PROCESS OF PREPARING NITROSOPHENYLALAMINE ESTERS WHICH COMPRISES TREATING BETA-ANILINOPROPIONITRILE WITH NITROUS ACID IN COLD ANHYDROUS ALCOHOLIC SOLUTION OF HYDROGEN CHLORIDE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |