Patent US3210189A successfully refreshed from Google Patents.
US3210189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic reversal process
Assignee: BASF Schweiz AG
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Filing: 1962-12-07
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Granted: 1965-10-05
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Expires: 1982-12-07
Abstract
No abstract record available.
Inventors
- 👤 Wartburg Rene Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:07
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IM THE PROCESS FOR THE PRODUCTION OF A DIRECT SILVER IMAGE OF AN ORIGINAL IN A PHOTOGRAPHIC MATERIAL CONTAINING AT LEAST ONE LIGHT SENSITIVE SILVER BROMIDE EMULSION, WHICH PROCESS COMPRISES THE STEPS OF EXPOSING TO LIGHT THE MATERIAL, DEVELOPING IT TO PRODUCE A METALLIC SILVER IMAGE, TRANSFORMING THE METALLIC SILVER IMAGE INTO A SILVER CHLORIDE IMAGE THAT IS MORE READILY SOLUBLE THAN THE SAID SILVER BROMIDE, DISSOLVING OUT THE SILVER CHLORIDE IMAGE WITH THE USE OF A SILVER HALIDE SOLVENT, AND REDUCING THE UNDEVELOPED SILVER BROMIDE, THE IMPROVEMENT WHICH COMPRISES TREATING THE MATERIAL, AT THE EARLIEST AFTER THE PRIMARY DEVELOPMENT AND AT THE LATEST DURING THE ACITON OF THE SILVER HALIDE SOLVENT, WITH A PASIVATING SUBSTNACE SELECTED FROM THE GROUP CONSISTING OF A MERCAPTOBENZTHIAZOLE AND A MERCAPTOBENZIMIDAZOLE.
Claim 2
Dependent Claim
127 words
IM THE PROCESS FOR THE PRODUCTION OF A DIRECT SILVER IMAGE OF AN ORIGINAL IN A PHOTOGRAPHIC MATERIAL CONTAINING AT LEAST ONE LIGHT SENSITIVE SILVER BROMIDE EMULSION, WHICH PROCESS COMPRISES THE STEPS OF EXPOSING TO LIGHT THE MATERIAL, DEVELOPING IT TO PRODUCE A METALLIC SILVER IMAGE, TRANSFORMING THE METALLIC SILVER IMAGE INTO A SILVER CHLORIDE IMAGE THAT IS MORE READILY SOLUBLE THAN THE SAID SILVER BROMIDE, DISSOLVING OUT THE SILVER CHLORIDE IMAGE WITH THE USE OF A SILVER HALIDE SOLVENT, AND REDUCING THE UNDEVELOPED SILVER BROMIDE, THE IMPROVEMENT WHICH COMPRISES TREATING THE MATERIAL, AT THE EARLIEST AFTER THE PRIMARY DEVELOPMENT AND AT THE LATEST DURING THE ACITON OF THE SILVER HALIDE SOLVENT, WITH A PASIVATING SUBSTNACE SELECTED FROM THE GROUP CONSISTING OF A MERCAPTOBENZTHIAZOLE AND A MERCAPTOBENZIMIDAZOLE.
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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |