US3241970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of photographic emulsions
Assignee: GAF Chemicals Corp
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Filing: 1961-10-06
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Granted: 1966-03-22
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Expires: 1981-10-06
Abstract
No abstract record available.
Inventors
- 👤 Stanley P Popeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; G03C2200/00; G03C2200/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR THE PREPARATION OF PHOTOGRAPHIC EMULSIONS WHICH COMPRISES ADDING A SILVER HALIDE SELECTED FROM THE GROUP CONSISTING OF SILVER BROMIDE, SILVER IODIDE AND MIXTURES OF THE TWO TO A NORMALLY LIQUID ORGANIC NITROGEN CONTAINING SOLVENT IN THE PRESENCE OF EXCESS BROMIDE IONS SO AS TO FORM A COMPLEX SOLUBLE IN SAID SOLVENT, AND THEN ADDING THE RESULTING SOLUTION OF SAID COMPLEX TO A SOLUTION OF CARRIER, THE SOLVENTS USED IN THE PREPARATION OF THE CARRIER SOLUTION BEING MISCIBLE WITH THE SAID NITROGEN CONTAINING SOLVENT AND CAPABLE OF BREAKING THE COMPLEX, THEREBY FORMING A DISPERSION OF SILVER HALIDE IN HE SOLUTION OF THE CARRIER.
Claim 2
Dependent Claim
105 words
A PROCESS FOR THE PREPARATION OF PHOTOGRAPHIC EMULSIONS WHICH COMPRISES ADDING A SILVER HALIDE SELECTED FROM THE GROUP CONSISTING OF SILVER BROMIDE, SILVER IODIDE AND MIXTURES OF THE TWO TO A NORMALLY LIQUID ORGANIC NITROGEN CONTAINING SOLVENT IN THE PRESENCE OF EXCESS BROMIDE IONS SO AS TO FORM A COMPLEX SOLUBLE IN SAID SOLVENT, AND THEN ADDING THE RESULTING SOLUTION OF SAID COMPLEX TO A SOLUTION OF CARRIER, THE SOLVENTS USED IN THE PREPARATION OF THE CARRIER SOLUTION BEING MISCIBLE WITH THE SAID NITROGEN CONTAINING SOLVENT AND CAPABLE OF BREAKING THE COMPLEX, THEREBY FORMING A DISPERSION OF SILVER HALIDE IN HE SOLUTION OF THE CARRIER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |