Patent US2854438A successfully refreshed from Google Patents.
US2854438A
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US
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Esters of n-carbamylamic acids from alpha olefinic alkene dioic acid anhydrides
Assignee: Uniroyal Inc
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Filing: 1953-11-30
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Granted: 1958-09-30
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Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Robert H Snyder
- 👤 Pliny O Tawney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:25
CPC Classifications
C; C07; C07C; C07C273/00; C07C273/18; C07C273/1854; C07C275/00; C07C275/46; C07C275/48; C07C275/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD OF PREPARING ESTERS OF ALPHA-OLEFINIC NCARBAMYLAMIC ACIDS WHICH COMPRISES REACTING AN N-CARBAMYLIMIDE OF THE CORRESPONDING ALPHA-OLEFINIC DICARBOXYLIC ACID HAVING TWO CARBON ATOMS BETWEEN THE CARBONYL GROUPS WITH A COMPOUND CONTAINING A NON-TERTIARY ALCOHOLIC HYDROXYL GROUP AND WHEREIN ANY AMINO GROUP WHICH MAY BE PRESENT IN THE REACTIVE HYDROXYL COMPOUND IS A TERTIARY AMINO GROUP.
Claim 2
Independent Claim
56 words
A METHOD OF PREPARING ESTERS OF ALPHA-OLEFINIC NCARBAMYLAMIC ACIDS WHICH COMPRISES REACTING AN N-CARBAMYLIMIDE OF THE CORRESPONDING ALPHA-OLEFINIC DICARBOXYLIC ACID HAVING TWO CARBON ATOMS BETWEEN THE CARBONYL GROUPS WITH A COMPOUND CONTAINING A NON-TERTIARY ALCOHOLIC HYDROXYL GROUP AND WHEREIN ANY AMINO GROUP WHICH MAY BE PRESENT IN THE REACTIVE HYDROXYL COMPOUND IS A TERTIARY AMINO GROUP.
References Cited (Backward Citations)
GB599065A
Cited
US2576895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |