US2494068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic relief image
Assignee: Eastman Kodak Co
•
Filing: 1946-06-03
•
Granted: 1950-01-10
•
Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Robert P Speck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF FORMING A PHOTOGRAPHIC RELIEF IMAGE WHICH COMPRISES DEVELOPING A GELATINO-SILVER HALIDE EMULSION LAYER TO FORM A SILVER IMAGE THEREIN, BLEACHING THE SILVER TO SILVER BROMIDE IN A HYDROCARBON PEROXIDE-BROMIDE BLEACH BATH HAVING A PH OF APPROXIMATELY 2.6 TO 3.0, WITHOUT DISSOLVING BUT WITH SOFTENING THE GELATIN IN THE REGION OF THE SILVER IMAGE, HARDENING SAID EMULSION PRIOR TO SAID BLEACHING AS A STEP IN THE PROCESS, WASHING OFF THE GELATIN SOFTENED BY THE BLEACH BATH IN WARM WATER, TO FORM A POSITIVE GELATINO-SILVER HALIDE RELIEF IMAGE.
Claim 2
Independent Claim
89 words
THE METHOD OF FORMING A PHOTOGRAPHIC RELIEF IMAGE WHICH COMPRISES DEVELOPING A GELATINO-SILVER HALIDE EMULSION LAYER TO FORM A SILVER IMAGE THEREIN, BLEACHING THE SILVER TO SILVER BROMIDE IN A HYDROCARBON PEROXIDE-BROMIDE BLEACH BATH HAVING A PH OF APPROXIMATELY 2.6 TO 3.0, WITHOUT DISSOLVING BUT WITH SOFTENING THE GELATIN IN THE REGION OF THE SILVER IMAGE, HARDENING SAID EMULSION PRIOR TO SAID BLEACHING AS A STEP IN THE PROCESS, WASHING OFF THE GELATIN SOFTENED BY THE BLEACH BATH IN WARM WATER, TO FORM A POSITIVE GELATINO-SILVER HALIDE RELIEF IMAGE.
References Cited (Backward Citations)
FR423150A
Cited
US1939947A
Cited
US1938290A
Cited
US2058396A
Cited
US2068879A
Cited
US2120441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |