Patent US3070428A successfully refreshed from Google Patents.
US3070428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reproducing negative images
Assignee: EIDP Inc
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Filing: 1959-08-18
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Granted: 1962-12-25
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Expires: 1979-08-18
Abstract
No abstract record available.
Inventors
- 👤 Cohen Abraham Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/92
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS WHICH COMPRISES PLACING IN HEAT CONDUCTIVE CONTACT WITH THE UNHEATED RELIEF SURFACE OF A METAL PRINTING RELIEF THE THERMALLY-SENSITIVE, IMAGE-FORMING SURFACE OF A THERMALLY-SENSITIVE IMAGE-RECORDING ELEMENT, THE THERMALLY-SENSISTIVE MATERIAL OF WHICH UNDERGOES THERMAL CHANGE AT A TEMPERATURE FROM ABOUT 50* C. TO 250*C. IN A PERIOD OF ABOUT 0.1 TO 60 SECONDS APPLYING HEAT TO THE REVERSE SURFACE OF SAID ELEMENT FROM THE DIRECTION OF ITS REVERSE SURFACE TOWARDS THE SURFACE OF THE RELIEF FOR A PERIOD OF ABOUT 0.1 TO 60 SECONDS AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 50*C. TO ABOUT 250*C. WHILE SAID SURFACES ARE IN CONTACT, WHEREBY A COLOR CHANGE OCCURS IN AREAS NOT CONTACTING SAID METAL RELIEF, AND REMOVING THE ELEMENT FROM THE METAL RELIEF.
Claim 2
Dependent Claim
123 words
A PROCESS WHICH COMPRISES PLACING IN HEAT CONDUCTIVE CONTACT WITH THE UNHEATED RELIEF SURFACE OF A METAL PRINTING RELIEF THE THERMALLY-SENSITIVE, IMAGE-FORMING SURFACE OF A THERMALLY-SENSITIVE IMAGE-RECORDING ELEMENT, THE THERMALLY-SENSISTIVE MATERIAL OF WHICH UNDERGOES THERMAL CHANGE AT A TEMPERATURE FROM ABOUT 50* C. TO 250*C. IN A PERIOD OF ABOUT 0.1 TO 60 SECONDS APPLYING HEAT TO THE REVERSE SURFACE OF SAID ELEMENT FROM THE DIRECTION OF ITS REVERSE SURFACE TOWARDS THE SURFACE OF THE RELIEF FOR A PERIOD OF ABOUT 0.1 TO 60 SECONDS AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 50*C. TO ABOUT 250*C. WHILE SAID SURFACES ARE IN CONTACT, WHEREBY A COLOR CHANGE OCCURS IN AREAS NOT CONTACTING SAID METAL RELIEF, AND REMOVING THE ELEMENT FROM THE METAL RELIEF.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |