US3615619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenanthroline antifoggants for silver halide emulsions
Assignee: Konica Minolta Inc
•
Filing: 1970-03-30
•
Granted: 1971-10-26
•
Expires: 1990-03-30
Abstract
Abstract A photographic material comprising phenanthroline antifogging agents for silver halide emulsions.
Inventors
- 👤 Toshihiko Yamamoto
- 👤 Kazuo Matui
- 👤 Sadao Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
A light-sensitive silver halide photographic material as claimed in claim 1, wherein said phenanthroline is in at least one layer selected from the emulsion layer, sublayer, interlayer, protective layer and backing layer.
Claim 2
Dependent Claim
35 words
A light-sensitive silver halide photographic material as claimed in claim 1, wherein said phenanthroline is incorporated together with a color coupler into one or more emulsion layer to constitute a light-sensitive silver halide color-photographic material.
Claim 3
Dependent Claim
32 words
A light-sensitive silver halide photographic material as claimed in claim 1, wherein the amount of said phenanthroline contained is 10 mg. to 1.0 g. per liter of the silver halide emulsion used.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |