US2706193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merocyanine dyes and method of making them
Assignee: Eastman Kodak Co
•
Filing: 1952-11-22
•
Granted: 1955-04-12
•
Expires: 1972-11-22
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:38
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE PYRROCOLINE DYE HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
7 words
THE PYRROCOLINE DYE HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
GB529440A
Cited
US2494031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |