US2764585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirobarbituric acid compounds
Assignee: —
•
Filing: —
•
Granted: 1956-09-25
•
Expires: 1973-09-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:10
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF 6-ISOPROPYL3,4-DIMETHYLSPIRO(CYCLOHEXANE-1,5''-BARBITURIC ACID) AND ATOXIC ANIONIC SALTS THEREOF.
Claim 2
Dependent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF 6-ISOPROPYL3,4-DIMETHYLSPIRO(CYCLOHEXANE-1,5''-BARBITURIC ACID) AND ATOXIC ANIONIC SALTS THEREOF.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |