US3023212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic dyes of the quinophthalone series
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
2026-11-05 14:33
CPC Classifications
C; C09; C09B; C09B25/00; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE FREE FORM, SALTS AND QUATERNARY FORMS OF COMPOUNDS WHOSE FREE BASE FORM IS DEFINED BY THE FORMULA
Claim 2
Dependent Claim
26 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE FREE FORM, SALTS AND QUATERNARY FORMS OF COMPOUNDS WHOSE FREE BASE FORM IS DEFINED BY THE FORMULA
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 |