Patent US3249352A successfully refreshed from Google Patents.
Patent US3000736A successfully refreshed from Google Patents.
US3000736A
Expired / Lapsed
US
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Photographic silver halide diffusion transfer process
Assignee: Eastman Kodak Co
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Filing: 1958-03-31
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Granted: 1961-09-19
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Richard W Karlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:44
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03C8/24; G03C8/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD OF FORMING A PHOTOGRAPHIC IMAGE WHICH COMPRISES EXPOSING TO A SUBJECT AN ELEMENT INCLUDING A SUPPORT, A SILVER PRECIPITATING STRATUM ON THE SUPPORT, AND ADHERED TO SAID STRATUM A LIGHT-SENSITIVE EMULSION LAYER CONTAINING SILVER HALIDEUNIFORMLY DISPERED IN AN ALKALISOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A MEMBER OF THE CLASS CONSISTING OF CELLULOSE ETHYL AND CELLULOSE ACERATE, DEVELOPING A LATENT IMAGE IN THE EMULSION LAYER WITH A SILVER HALIDE DEVELOPING SOLUTION CONTAINING A SILVER HALIDE DEVELOPING AGENT AND A SILVER HALIDE SOLVENT IN CONTIGUITY WITH A MEMBER OF THE CLASS, CONSISTING OF 5-NITROINDAZOLE, 6-NITROINDAZOLE AND 5,6-DINITTRONINDAZOLE TO FORM A SILVER IMAGE AND IMAGEWISE DISTRIBUTION OF A SOLUBLE SILVER COMPLEX IN THE EMULSION LAYER, ALLOWING A PORTION OF SAID SILVER COMPLEX TO DIFFUSE IMAGEWISE TO SAID SILVERPRECIPITATING STRATUM AND THE SILVER OF SAID PORTION OF SILVER COMPLEX TO BE PRECIPITATED IN SAID STRATUM AS A SILVER IMAGE IF IMPROVED TONE, AND REMOVING THE EMULSION LAYER FROM SAID STRATUM.
Claim 2
Independent Claim
158 words
A METHOD OF FORMING A PHOTOGRAPHIC IMAGE WHICH COMPRISES EXPOSING TO A SUBJECT AN ELEMENT INCLUDING A SUPPORT, A SILVER PRECIPITATING STRATUM ON THE SUPPORT, AND ADHERED TO SAID STRATUM A LIGHT-SENSITIVE EMULSION LAYER CONTAINING SILVER HALIDEUNIFORMLY DISPERED IN AN ALKALISOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A MEMBER OF THE CLASS CONSISTING OF CELLULOSE ETHYL AND CELLULOSE ACERATE, DEVELOPING A LATENT IMAGE IN THE EMULSION LAYER WITH A SILVER HALIDE DEVELOPING SOLUTION CONTAINING A SILVER HALIDE DEVELOPING AGENT AND A SILVER HALIDE SOLVENT IN CONTIGUITY WITH A MEMBER OF THE CLASS, CONSISTING OF 5-NITROINDAZOLE, 6-NITROINDAZOLE AND 5,6-DINITTRONINDAZOLE TO FORM A SILVER IMAGE AND IMAGEWISE DISTRIBUTION OF A SOLUBLE SILVER COMPLEX IN THE EMULSION LAYER, ALLOWING A PORTION OF SAID SILVER COMPLEX TO DIFFUSE IMAGEWISE TO SAID SILVERPRECIPITATING STRATUM AND THE SILVER OF SAID PORTION OF SILVER COMPLEX TO BE PRECIPITATED IN SAID STRATUM AS A SILVER IMAGE IF IMPROVED TONE, AND REMOVING THE EMULSION LAYER FROM SAID STRATUM.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |