US2538104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glutamyl-glutamyl-glutamic esters
Assignee: Merck and Co Inc
•
Filing: 1948-12-01
•
Granted: 1951-01-16
•
Expires: 1968-12-01
Abstract
No abstract record available.
Inventors
- 👤 Frank R Koniuszy
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:05
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/02; C07D475/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
GLUTAMYL-GLUTAMYL-GLUTAMIC ESTERS HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
GLUTAMYL-GLUTAMYL-GLUTAMIC ESTERS HAVING THE FORMULA:
References Cited (Backward Citations)
DE556798C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |