US3794495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of static in light-sensitive photographic materials using bisaminimide compounds
Assignee: Konica Minolta Inc
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Filing: 1971-12-16
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Granted: 1974-02-26
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Expires: 1991-12-16
Abstract
Abstract ANTISTATIC AGENTS FOR USE IN LIGHT-SENSITIVE SILVER HALIDE PHOTOGRAPHIC MATERIALS COMPRISE BIS-ACYL HYDRAZINIUM SALTS HAVING THE FORMULA R2-CO-NH-N(+)(-R1)(-R3)-R4-N(+)(-R5(-R7)-NH-CO-R6 2X(-) I R2-N(+)(-R1)(-R3)-NH-CO-R4-CO-NH-N(+)(-R5)(-R7)-R6 2X(-)II R2-N(+)(-R)(-R3)-NH-CO-R4-N(+)(-R5)(-R7)-NH-CO-R6 2X(-)III WHEREIN R1, R3, R5 AND R7 ARE INDIVIDUALLY A LOWER ALKYL GROUP; R2 AND R6 ARE INDIVIDUALLY AN ALKYL, ARALKYL OR ARYL GROUP OR A HETERO RING; R4 IS A DIVALENT GROUP; AND X IS AN ANION RESIDUE.
Inventors
- 👤 M Ishihara
- 👤 T Wada
- 👤 H Yamaguchi
- 👤 S Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:37
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C5/00; G03C5/26; G03C5/29; G03C5/305
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |