US2886436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-amino-8-hydroxyquinolines as coupling components for azine dye images
Assignee: GAF Chemicals Corp
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Filing: 1957-02-21
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Granted: 1959-05-12
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Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 Willy A Schmidt
- 👤 Robert F Coles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3244; C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/38; C07D215/48; C07D215/50; C07D215/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
PROCESS OF PRODUCING MAGENTA AZINE DYE IMAGES WHICH COMPRISES EXPOSING TO LIGHT A LIGHT SENSITIVE SILVER HALIDE EMULSION AND DEVELOPING THE SAME WITH A P-PHENYLENEDIAMINE DEVELOPER IN THE PRESENCE OF A COLOR FORMER OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
37 words
PROCESS OF PRODUCING MAGENTA AZINE DYE IMAGES WHICH COMPRISES EXPOSING TO LIGHT A LIGHT SENSITIVE SILVER HALIDE EMULSION AND DEVELOPING THE SAME WITH A P-PHENYLENEDIAMINE DEVELOPER IN THE PRESENCE OF A COLOR FORMER OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2701766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |