Patent US2721201A successfully refreshed from Google Patents.
US2721201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
S-monofluoroalkyl barbituric acids
Assignee: —
•
Filing: —
•
Granted: 1955-10-18
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Expires: 1972-10-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:00
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
35 words
THE PROCESS OF PREPARING FLUORINE-CONTAINING BARBITURIC ACID DERIVATIVES WHICH COMPRISES REACTING AN ESTER OF MALONIC ACID CONTAINING A MONOFLUOROALKYL SUBSTITUENT AND UREA IN AN ANHYDROUS ALCOHOL AND IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT.
Claim 4
Dependent Claim
35 words
THE PROCESS OF PREPARING FLUORINE-CONTAINING BARBITURIC ACID DERIVATIVES WHICH COMPRISES REACTING AN ESTER OF MALONIC ACID CONTAINING A MONOFLUOROALKYL SUBSTITUENT AND UREA IN AN ANHYDROUS ALCOHOL AND IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT.
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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |