US3782954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the uniform preparation of silver halide grains
Assignee: Eastman Kodak Co
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Filing: 1971-11-01
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Granted: 1974-01-01
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Expires: 1991-11-01
Abstract
Abstract 1. A METHOD AND APPARATUS FOR ITS PRACTICE ARE DISCLOSED WHERE, UNIFORMLY SIZED SILVER HALIDE GRAINS ARE PRECIPITATED IN AN AQUEOUS PEPTIZER SOLUTION BY THE REACTION OF A SILVER SALT SOLUTION WITH A HALIDE SALT SOLUTIONS, WHERE AT LEAST ONE OF THE SOLUTIONS HAS BEEN MIXED WITH A PORTION OF THE PEPTIZER SOLUTION PRIOR TO ITS REACTION WITH THE OTHER SLUTION WITHIN THE REMAINDER OF THE PEPTIZER SOLUTION, APPARATUS IS DISCLOSED FOR PRACTICING THE METHOD OF THIS INVENTION INCLUDING AT LEAST ONE SEPARATE MIXING CHAMBER FOR DILUTION OF A SLAT SOLUTION WITH A PORTION OF THE PEPTIZER SOLUTION PRIOR TO THE PRECIPITATION REACTION.
Inventors
- 👤 H Porter
- 👤 B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/015; B; B01; B01F; B01F27/00; B01F27/80; B01F27/81; B01F27/812; G03C1/035; G03C2001/0357; G03C2200/00; G03C2200/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD AND APPARATUS FOR ITS PRACTICE ARE DISCLOSED WHERE, UNIFORMLY SIZED SILVER HALIDE GRAINS ARE PRECIPITATED IN AN AQUEOUS PEPTIZER SOLUTION BY THE REACTION OF A SILVER SALT SOLUTION WITH A HALIDE SALT SOLUTIONS, WHERE AT LEAST ONE OF THE SOLUTIONS HAS BEEN MIXED WITH A PORTION OF THE PEPTIZER SOLUTION PRIOR TO ITS REACTION WITH THE OTHER SLUTION WITHIN THE REMAINDER OF THE PEPTIZER SOLUTION, APPARATUS IS DISCLOSED FOR PRACTICING THE METHOD OF THIS INVENTION INCLUDING AT LEAST ONE SEPARATE MIXING CHAMBER FOR
Claim 2
Independent Claim
85 words
A METHOD AND APPARATUS FOR ITS PRACTICE ARE DISCLOSED WHERE, UNIFORMLY SIZED SILVER HALIDE GRAINS ARE PRECIPITATED IN AN AQUEOUS PEPTIZER SOLUTION BY THE REACTION OF A SILVER SALT SOLUTION WITH A HALIDE SALT SOLUTIONS, WHERE AT LEAST ONE OF THE SOLUTIONS HAS BEEN MIXED WITH A PORTION OF THE PEPTIZER SOLUTION PRIOR TO ITS REACTION WITH THE OTHER SLUTION WITHIN THE REMAINDER OF THE PEPTIZER SOLUTION, APPARATUS IS DISCLOSED FOR PRACTICING THE METHOD OF THIS INVENTION INCLUDING AT LEAST ONE SEPARATE MIXING CHAMBER FOR
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |