US2572284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Para-amino, gamma resorcylic acid and salts, and process for manufacture
Assignee: ENDO PRODUCTS Inc
•
Filing: 1949-10-21
•
Granted: 1951-10-23
•
Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Schoen Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/15; C07C229/00; C07C229/52; C07C229/54; C07C229/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
COMPOUNDS OF THE GROUP CONSISTING OF 2,6DIHYDROXY-4-AMINO BENZOIC ACID AND THE ALKALI METAL SALTS OF SAID ACID.
Claim 2
Dependent Claim
17 words
COMPOUNDS OF THE GROUP CONSISTING OF 2,6DIHYDROXY-4-AMINO BENZOIC ACID AND THE ALKALI METAL SALTS OF SAID ACID.
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) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |