US2650877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing etched printing plates
Assignee: EIDP Inc
•
Filing: 1949-12-09
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Granted: 1953-09-01
•
Expires: 1969-12-09
Abstract
No abstract record available.
Inventors
- 👤 Boyer Mahlon Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS OF MAKING AN ETCHED PRINTING PLATE WHICH COMPRISES EXPOSING SEPARATELY THROUGH A SCREEN AND A PHOTOGRAPHIC IMAGE A FILM ELEMENT HAVING AN OUTER LIGHT-SENSITIVE GELATINO SILVER HALIDE EMULSION LAYER AND A HYDROPHOBIC SUPPORT, DEVELOPING SAID FILM IN A NON-HARDENING PHOTOGRAPHIC DEVELOPER SOLUTION, FIXING THE DEVELOPED FILM IN A NON-HARDENING FIXING SOLUTION, BLEACHING THE FIXED FILM IN A HARDENING BLEACH BATH, PRESSING THE BLEACHED SILVER SALT GELATIN LAYER INTO CONTACT WITH THE SURFACE OF A METAL PRINTING MEMBER, REMOVING THE SUPPORT FROM THE LATTER LAYER, WASHING THE UNHARDENED GELATIN FROM THE BLEACHED SILVER SALT GELATIN LAYER AND TREATING THE RELIEF IMAGIE WITH AN ACID ETCHING BATH WHEREBY AN IMAGE IS ETCHED INTO THE SURFACE OF SAID PRINTING MEMBER.
Claim 2
Dependent Claim
119 words
A PROCESS OF MAKING AN ETCHED PRINTING PLATE WHICH COMPRISES EXPOSING SEPARATELY THROUGH A SCREEN AND A PHOTOGRAPHIC IMAGE A FILM ELEMENT HAVING AN OUTER LIGHT-SENSITIVE GELATINO SILVER HALIDE EMULSION LAYER AND A HYDROPHOBIC SUPPORT, DEVELOPING SAID FILM IN A NON-HARDENING PHOTOGRAPHIC DEVELOPER SOLUTION, FIXING THE DEVELOPED FILM IN A NON-HARDENING FIXING SOLUTION, BLEACHING THE FIXED FILM IN A HARDENING BLEACH BATH, PRESSING THE BLEACHED SILVER SALT GELATIN LAYER INTO CONTACT WITH THE SURFACE OF A METAL PRINTING MEMBER, REMOVING THE SUPPORT FROM THE LATTER LAYER, WASHING THE UNHARDENED GELATIN FROM THE BLEACHED SILVER SALT GELATIN LAYER AND TREATING THE RELIEF IMAGIE WITH AN ACID ETCHING BATH WHEREBY AN IMAGE IS ETCHED INTO THE SURFACE OF SAID PRINTING MEMBER.
References Cited (Backward Citations)
US1482612A
Cited
GB190501A
Cited
US1709569A
Cited
US2100224A
Cited
US2325519A
Cited
US2391171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |