US2494875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di-n-butylamino malonic acid-ethyldiethylaminoethyl ester
Assignee: Wander AG
•
Filing: 1948-11-05
•
Granted: 1950-01-17
•
Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 Hirt Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:58
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
AS A NEW PRODUCT DI-N-BUTYLAMINOMALONIC ACID-ETHYL-DIETHYLAMINOETHYLESTER.
Claim 2
Dependent Claim
6 words
AS A NEW PRODUCT DI-N-BUTYLAMINOMALONIC ACID-ETHYL-DIETHYLAMINOETHYLESTER.
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |