US3062643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer process
Assignee: Eastman Kodak Co
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Filing: 1959-05-22
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Granted: 1962-11-06
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Expires: 1979-05-22
Abstract
No abstract record available.
Inventors
- 👤 Roy C Bloom
- 👤 Frederick A Pomeroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:39
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A METHOD OF FORMING A PHOPTOGRAPHIC IMAGE WHICH COMPRISES EXPOSING TO A SUBJECT AN ELEMENT INCLUDING AA SUPPORT, A SILVER PRECIPITATING STRATUM ON THE SUPPORT, AND ADHERED TO SAID STRATUM A LIGHT-SENSITIVE EMULSION LAYER CONTAINING SILVER HALIDE UNIFORMLY DISPERSED IN A MEMBER OF THE CLASS CONSISITNG OF AN ALKALI-SOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A CELLULOSE ETHYL ETHER AND AN ALKALISOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A CELLULOSE ACETATE, DEVELOPING THE LATENT IMAGE IN THE EMULSION LAYER WITH AN ALKALINE SILVER HALIDE DEVELOPING SOLUTION CONTAINING A QUATERNARY AMMONIUM SALT HAVING A LINEAR CHAIN OF AT LEAST 7 ATOMS ATTACHED TO A QUATERNARY NITROGEN ATOM, A HYDRO-E QUINONE, SULFITE, A SILVER HALIDE SOLVENT, POTASSIUM CHLORIDE AND A MEMBER OF THE CLASS CONSISTING OF A MONOALKYL-P AMINOPHENOL SILVER HALIDE DEVELOPING AGENT TO FORM A SILVER OLIDONE SILVER HALIDE DEVELOPING AGENT, TO FORM A SILVER IMAGE AND AN IMAGEWISE DISTRIBUTION AGENT, TO FORM A SILVER COMPLEX IN THE EMULSION LAYER, ALLOWING A PORTION OF SAID SILVER COMPLEX TO DIFFUSE IMAGEWISE TO SAID SILVER PRECIPI-PLEX TO BE PRECIPITATED IN SAID STRATUM, AND REMOVING THE EMULSION LAYER FROM SAID STRATUM.
Claim 2
Independent Claim
185 words
A METHOD OF FORMING A PHOPTOGRAPHIC IMAGE WHICH COMPRISES EXPOSING TO A SUBJECT AN ELEMENT INCLUDING AA SUPPORT, A SILVER PRECIPITATING STRATUM ON THE SUPPORT, AND ADHERED TO SAID STRATUM A LIGHT-SENSITIVE EMULSION LAYER CONTAINING SILVER HALIDE UNIFORMLY DISPERSED IN A MEMBER OF THE CLASS CONSISITNG OF AN ALKALI-SOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A CELLULOSE ETHYL ETHER AND AN ALKALISOLUBLE ACID-INSOLUBLE DIBASIC ACID ESTER OF A CELLULOSE ACETATE, DEVELOPING THE LATENT IMAGE IN THE EMULSION LAYER WITH AN ALKALINE SILVER HALIDE DEVELOPING SOLUTION CONTAINING A QUATERNARY AMMONIUM SALT HAVING A LINEAR CHAIN OF AT LEAST 7 ATOMS ATTACHED TO A QUATERNARY NITROGEN ATOM, A HYDRO-E QUINONE, SULFITE, A SILVER HALIDE SOLVENT, POTASSIUM CHLORIDE AND A MEMBER OF THE CLASS CONSISTING OF A MONOALKYL-P AMINOPHENOL SILVER HALIDE DEVELOPING AGENT TO FORM A SILVER OLIDONE SILVER HALIDE DEVELOPING AGENT, TO FORM A SILVER IMAGE AND AN IMAGEWISE DISTRIBUTION AGENT, TO FORM A SILVER COMPLEX IN THE EMULSION LAYER, ALLOWING A PORTION OF SAID SILVER COMPLEX TO DIFFUSE IMAGEWISE TO SAID SILVER PRECIPI-PLEX TO BE PRECIPITATED IN SAID STRATUM, 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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |