US2808408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl malonic acid derivatives
Assignee: CALANDA STIFTUNG
•
Filing: 1956-03-29
•
Granted: 1957-10-01
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Taub William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:54
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
(BICYCLO-OCTENYL)-ALKYL MALONIC ACID DERIVATIVES CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
8 words
(BICYCLO-OCTENYL)-ALKYL MALONIC ACID DERIVATIVES CORRESPONDING TO THE FORMULA:
References Cited (Backward Citations)
US2744900A
Cited
DE925168C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |