US3023213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters and amides of 3'-hydroxyquin-ophthalone-5-carboxylic acid and derivatives thereof
Assignee: EIDP Inc
•
Filing: 1960-06-30
•
Granted: 1962-02-27
•
Expires: 1980-06-30
Abstract
No abstract record available.
Inventors
- 👤 Richter John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:45
CPC Classifications
C; C09; C09B; C09B25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A COMPOUND OF THE FORMULA WHEREIN X AND Y REPRESENT MEMBERS OF THE GROUP CONSISTING OF H, CL, BR, CH3 AND PHENYL AND WHEN TAKEN TOGETHER FORM THE BENZO CONFIGURATION
Claim 2
Dependent Claim
30 words
A COMPOUND OF THE FORMULA WHEREIN X AND Y REPRESENT MEMBERS OF THE GROUP CONSISTING OF H, CL, BR, CH3 AND PHENYL AND WHEN TAKEN TOGETHER FORM THE BENZO CONFIGURATION
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |