US2744900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of new derivatives of barbituric acid
Assignee: BASF SE
•
Filing: 1954-03-01
•
Granted: 1956-05-08
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Reppe Walter
- 👤 Schlichting Otto
- 👤 Westphal Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
DERIVATIVES OF BARBITURIC ACID OF THE GENERAL FORMULA
Claim 2
Dependent Claim
8 words
DERIVATIVES OF BARBITURIC ACID OF THE GENERAL FORMULA
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |