US2604488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenyl ester of p-aminosalicylic acid
Assignee: Rhone Poulenc SA
•
Filing: 1951-06-06
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Granted: 1952-07-22
•
Expires: 1971-06-06
Abstract
No abstract record available.
Inventors
- 👤 Freire Santiago Americano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:57
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/52; C07C229/54; C07C229/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
PHENYL-2-HYDROXY-4-AMINOBENZOATE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
5 words
PHENYL-2-HYDROXY-4-AMINOBENZOATE HAVING THE STRUCTURAL 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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |