US2994693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric azo dye
Assignee: EIDP Inc
•
Filing: 1956-06-29
•
Granted: 1961-08-01
•
Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Blake Norman
- 👤 Jr Harold Wayne Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:48
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08L; C08L75/00; C09B43/00; Y; Y10; Y10S; Y10S534/00; Y10S534/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A POLYMERIC DYE HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A POLYMERIC DYE HAVING THE FORMULA
References Cited (Backward Citations)
US2274551A
Cited
US2548376A
Cited
US2668804A
Cited
US2632004A
Cited
US2779772A
Cited
US2813856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |