Patent JPS61240447A successfully refreshed from Google Patents.
US3148060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloid transfer process and activator solution therefor
Assignee: Eastman Kodak Co
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Filing: 1962-12-05
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Granted: 1964-09-08
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Expires: 1982-12-05
Abstract
No abstract record available.
Inventors
- 👤 Fruchard Alain
- 👤 Richard Andre Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/315; G03C5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
A METHOD OF PHOTOGRAPHIC REPRODUCTION WHICH COMPRISES DEVELOPING AN EXPOSED, SUBSTANTIALLY UNHARDENED GELATINO-SILVER HALIDE EMULSION LAYER, SAID EMULSION NOT BEING HARDER THAN A GELATIN LAYER CONTAINING 0.7 GRAM OF FORMALDEHYDE PER POUND OF GELATIN FRESHLY COATED, WITH AN AQUEOUS SOLUTION HAVING A KPH OF 10.10 TO 10.20 AND AN AKLALINITY OF ABOVE 0.7500 N, CONSISTING ESSENTIALLY KOF WATER, 22-28 GRAMS PER LITER POTASSIUM CARBONATE, 30-40 GRAMS PER LITER SODIUM SESQUICARBONATE, 20-30 GRAMS PER LITER UREA AND 0.2 TO 3.0 GRAMS PER LITER OF A CHLORIDE SELECTED FROM THE CLASS CONSISTING OF AMMONIUM CHLORIDE, ALKALI METAL CHLORIDES AND ALKALINE EARTH CHLORIDES, IN THE PRESENCE OF BOTH A GELATIN TANNING SILVER HALIDE DEVELOPING AGENT AND A SUBSTANTIALLY NONTANNING SILVER HALIDE DEVELOPING AGENT TO OBTAIN A HARDENED GELATIN AND SILVER IMAGE IN THE AREAS OF THE EMULSION LAYER CORRESPONDING TO THE HIGHLIGHTS OF THE SUBJECT, AND SUBSEQUENTLY UNHARDENED GELATIN, SILVER AND SILVER HALIDE IN THE AREAS OF THE EMULSION LAYER CORRESPONDING TO THE SHADOWS OF THE SUBJECT, SAID DEVELOPMENT BEING SUCH AS TO PREVENT ANY SUBSTANTIAL TANNING OF THE EMULSION LAYER IN SAID AREAS CORRESPONDING TO THE SHADOWS OF THE SUBJECT, PRESSING A SHEET HAVING AN ABSORBENT SURFACE AGAINST SAID EMULSION LAYER WHILE SAID EMULSION LAYER IS MOIST TO CAUSE ONLY THE
Claim 2
Independent Claim
209 words
A METHOD OF PHOTOGRAPHIC REPRODUCTION WHICH COMPRISES DEVELOPING AN EXPOSED, SUBSTANTIALLY UNHARDENED GELATINO-SILVER HALIDE EMULSION LAYER, SAID EMULSION NOT BEING HARDER THAN A GELATIN LAYER CONTAINING 0.7 GRAM OF FORMALDEHYDE PER POUND OF GELATIN FRESHLY COATED, WITH AN AQUEOUS SOLUTION HAVING A KPH OF 10.10 TO 10.20 AND AN AKLALINITY OF ABOVE 0.7500 N, CONSISTING ESSENTIALLY KOF WATER, 22-28 GRAMS PER LITER POTASSIUM CARBONATE, 30-40 GRAMS PER LITER SODIUM SESQUICARBONATE, 20-30 GRAMS PER LITER UREA AND 0.2 TO 3.0 GRAMS PER LITER OF A CHLORIDE SELECTED FROM THE CLASS CONSISTING OF AMMONIUM CHLORIDE, ALKALI METAL CHLORIDES AND ALKALINE EARTH CHLORIDES, IN THE PRESENCE OF BOTH A GELATIN TANNING SILVER HALIDE DEVELOPING AGENT AND A SUBSTANTIALLY NONTANNING SILVER HALIDE DEVELOPING AGENT TO OBTAIN A HARDENED GELATIN AND SILVER IMAGE IN THE AREAS OF THE EMULSION LAYER CORRESPONDING TO THE HIGHLIGHTS OF THE SUBJECT, AND SUBSEQUENTLY UNHARDENED GELATIN, SILVER AND SILVER HALIDE IN THE AREAS OF THE EMULSION LAYER CORRESPONDING TO THE SHADOWS OF THE SUBJECT, SAID DEVELOPMENT BEING SUCH AS TO PREVENT ANY SUBSTANTIAL TANNING OF THE EMULSION LAYER IN SAID AREAS CORRESPONDING TO THE SHADOWS OF THE SUBJECT, PRESSING A SHEET HAVING AN ABSORBENT SURFACE AGAINST SAID EMULSION LAYER WHILE SAID EMULSION LAYER IS MOIST TO CAUSE ONLY THE
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |