US3214437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-equivalent thiocyano couplers of 5-pyrazolones
Assignee: Eastman Kodak Co
•
Filing: 1960-04-28
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Granted: 1965-10-26
•
Expires: 1980-04-28
Abstract
No abstract record available.
Inventors
- 👤 Loria Anthony
- 👤 Ilmari F Salminen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:32
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D231/52; C07D231/28; G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A MAGENTA-DYE-FORMING COUPLER HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
A MAGENTA-DYE-FORMING COUPLER HAVING 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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |