Patent US3575705A successfully refreshed from Google Patents.
US3575705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for hardening a light-sensitive silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1968-10-22
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Granted: 1971-04-20
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Expires: 1988-10-22
Abstract
Abstract A COMPOUND OF THE FORMULA ((4,6-BIS(2-R-AZIRIDINO)-S-TRIAZIN-2-YL)-N(-R''))2-R" WHEREIN R IS HYDROGEN, METHYL OR ETHYL;R'' IS HYDROGEN OR A GROUP CAPABLE OF FORMING A PIPERAZINE RING TOGETHER WITH R'' AND N; AND R" IS AN ALKYLENE RADICAL HAVING LESS THAN 10 CARBON ATOMS OR A SUBSTITUTED OR NONSUBSTITUTED PHENYLENE GOUP IS ADDED TO A LIGHT SENSITIVE GELATINOUS SILVER HALIDE PHOTOGRAPHIC MATERIAL TO HARDEN SAME.
Inventors
- 👤 Shui Sato
- 👤 Tomio Nakajima
- 👤 Masayuki Shono
- 👤 Teruo Kagami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:18
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/302
Claims Analysis
Total Claims: 0
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |