US2761874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino derivatives of n-alkyl substituted aspartic acids and their functional derivatives
Assignee: Dow Chemical Co
•
Filing: 1954-09-30
•
Granted: 1956-09-04
•
Expires: 1974-09-30
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Bersworth
- 👤 Albert E Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
C; C07; C07C; C07C231/00; C07C231/12; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AMINO DERIVATIVES OF N-ALKYL SUBSTITUTED ASPARTIC ACIDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
11 words
AMINO DERIVATIVES OF N-ALKYL SUBSTITUTED ASPARTIC ACIDS HAVING THE GENERAL FORMULA:
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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |