US3598593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic emulsions and method of making
Assignee: GAF Corp
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Filing: 1965-12-21
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Granted: 1971-08-10
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Expires: 1985-12-21
Abstract
Abstract PREPARATION OF GELATIN-SILVER BROMIDE PHOTOGRAPHIC EMULSIONS, INVOLVING PRECIPITATION OF THE SILVER BROMIDE BY ADMIXTURE OF AQUEOUS SOLUTIONS OF A WATER SOLUBLE SILVER SALT AND A WATER SOLUBLE BROMIDE, WHEREIN THE PBR IS MAINTAINED ABOVE 5 DURING FORMATION OF THE MAJR PORTION OF THE SILVER BROMIDE, WHEREBY THE AVERAGE PARTICLE SIZE OF THE SILVER BROMIDE FORMING IS ABOVE 0.8 MICRON, AND FINALLY ADDING EXCESS BROMIDE SOLUTION AT THE END OF THE SILVER BROMIDE FORMATION.
Inventors
- 👤 Guenther Harald Klinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C1/035; G03C2001/03594
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |