US2557284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of pantothenic acid, intermediates thereof, and process for their production
Assignee: Merck and Co Inc
•
Filing: 1948-03-03
•
Granted: 1951-06-19
•
Expires: 1968-03-03
Abstract
No abstract record available.
Inventors
- 👤 Stanton A Harris
- 👤 Folkers Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:04
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/45; C07C233/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
MONOACYLATED PANTOTHENIC ACID COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
7 words
MONOACYLATED PANTOTHENIC ACID COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |