US2923735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of derivatives of 4-hydroxy-isophthalic acid
Assignee: Individual
•
Filing: 1956-07-03
•
Granted: 1960-02-02
•
Expires: 1976-07-03
Abstract
No abstract record available.
Inventors
- 👤 Erlenmeyer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:35
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/03; C07C233/00; C07C233/01; C07C233/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
4-HYDROXY-ISOPHTHALIC ACID-1-MONOAMIDE.
Claim 2
Dependent Claim
2 words
4-HYDROXY-ISOPHTHALIC ACID-1-MONOAMIDE.
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |