US3565631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6 - amidinothio - 5,7 - dihydroxy - s - triazolo(2,3-a) pyrimidino compounds as stabilizers for silver halide emulsion
Assignee: Konica Minolta Inc
•
Filing: 1967-07-07
•
Granted: 1971-02-23
•
Expires: 1987-07-07
Abstract
Abstract A LIGHT-SENSITIVE SILVER HALIDE PHOTOGRAPHIC ELEMENT BEARS ON A SUPPORT A PHOTO-SENSITIVE LAYER CONTAINING A 6AMIDINOTHIO-5,7-DIHYDROXY-S-TRIAZOLO(2,3-A)PYRIMIDINE COMPOUND OF THE FORMULA: 2-R,5,7-DI(HO-),6-(H2N-C(=NH)-S-)-S-TRIAZOLO(4,3-B)- PYRIDAZINE WHEREIN R MEANS HYDROGEN OR A LOWER ALKYL GROUP. THE COMPOUNDS ACTS AS A STABILIZER TO PROLONG THE LIFE OF THE PHOTOGRAPHIC ELEMENT.
Inventors
- 👤 Masanobu Oguchi
- 👤 Yoshimi Kuwabara
- 👤 Katsuo Mogaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:50
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |