Patent US3370170A successfully refreshed from Google Patents.
US3370170A
Expired / Lapsed
US
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Article and method for forming a thermographic reproduction on a sheet of polyethylene terephthalate
Assignee: Keuffel and Esser Co
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Filing: 1964-10-02
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Granted: 1968-02-20
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Robert M Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:39
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF MAKING A THERMORGARAPHIC REPRODUCTION, WHICH COMPRISES THE STEPS OF: TREATING A POLYETHYLENE TEREPHTHALATE SUPPORT WITH AN ACID SOLUTION TO IMPRIVE THE SURFACE BONDING PROPERTIES OF SAID SUPPORT; DRYING THE SUPPORT THE REMOVE SOLVENT FROM SAID SUPPORT WITHOUT REMOVING ACID FROM THE SURFACE THEREOF; PROVIDING A LAYER OF DIFFUSIBLE DYE IN HEAT-CONDUCTIVE CONTACT WITH SAID SUPPORT; HEATING SAID SUPPORT IMAGEWISE TO DIFFUSE DYE INTO SAID SUPPORT IN AREAS CORRESPONDING TO THE HEATED IMAGE AREAS; AND REMOVING DYE FORM THE HEATED AREAS, THEREBY PRODUCING A DYED IMAGE ON SAID SUPPORT.
Claim 2
Independent Claim
91 words
A METHOD OF MAKING A THERMORGARAPHIC REPRODUCTION, WHICH COMPRISES THE STEPS OF: TREATING A POLYETHYLENE TEREPHTHALATE SUPPORT WITH AN ACID SOLUTION TO IMPRIVE THE SURFACE BONDING PROPERTIES OF SAID SUPPORT; DRYING THE SUPPORT THE REMOVE SOLVENT FROM SAID SUPPORT WITHOUT REMOVING ACID FROM THE SURFACE THEREOF; PROVIDING A LAYER OF DIFFUSIBLE DYE IN HEAT-CONDUCTIVE CONTACT WITH SAID SUPPORT; HEATING SAID SUPPORT IMAGEWISE TO DIFFUSE DYE INTO SAID SUPPORT IN AREAS CORRESPONDING TO THE HEATED IMAGE AREAS; AND REMOVING DYE FORM THE HEATED AREAS, THEREBY PRODUCING A DYED IMAGE ON SAID SUPPORT.
References Cited (Backward Citations)
US2721821A
Cited
US3147377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |