Patent US2976294A successfully refreshed from Google Patents.
US2976294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dye intermediates
Assignee: EIDP Inc
•
Filing: 1959-01-26
•
Granted: 1961-03-21
•
Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 Firestine John Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C08; C08F; C08F20/00; C08F20/02; C08F20/52; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/327; G03C7/3275
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A MONOMERIC COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A MONOMERIC COMPOUND OF 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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |