Patent US3974312A successfully refreshed from Google Patents.
Patent US3219818A successfully refreshed from Google Patents.
US3219818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermographic recording process
Assignee: EIDP Inc
•
Filing: 1962-10-05
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Granted: 1965-11-23
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Expires: 1982-10-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Ray Henry Luebbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/28; B41M5/282; B41M5/284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS WHICH COMPRISES EXPOSING IMAGEWISE, THERMOGRAPHICALLY, AT A TEMPERATURE OF AT LEAST 140*F. A SOLID, UNIFORM LAYER, SAID LAYER HAVING INTIMATELY AND UNIFORMLY DISPERSED THERETHROUGH: (1) A MACROMOLECULAR ORGANIC POLYMER SOLID AT 100* F., AND (2) AT LEAST ONE BASIC DYE IN MOLECULARLY ASSOCIATED FORM THAT BECOMES MOLECULARYLY DISSOCIATED PHYSICALLY UPON HEATING TO A TEMPERATURE OF AT LEAST 140*F. TO THE EXTENT THAT THE EXTINCTION COEFFICIENT OF THE DYE INCREASES BY AT LEAST 50% IN ONE OF THE WAVELENGTH REGIONS OF INTENSE DYE ABSORPTION; TO MOLECULARLY DISSOCIATE THE DYE PHYSICALLY INT HE IMAGEWISE EXPOSED AREAS FROM THE MOLECULARLY ASSOCIATED FORM TO THE MOLECULARYLY DISSOCIATED FORM.
Claim 2
Dependent Claim
106 words
A PROCESS WHICH COMPRISES EXPOSING IMAGEWISE, THERMOGRAPHICALLY, AT A TEMPERATURE OF AT LEAST 140*F. A SOLID, UNIFORM LAYER, SAID LAYER HAVING INTIMATELY AND UNIFORMLY DISPERSED THERETHROUGH: (1) A MACROMOLECULAR ORGANIC POLYMER SOLID AT 100* F., AND (2) AT LEAST ONE BASIC DYE IN MOLECULARLY ASSOCIATED FORM THAT BECOMES MOLECULARYLY DISSOCIATED PHYSICALLY UPON HEATING TO A TEMPERATURE OF AT LEAST 140*F. TO THE EXTENT THAT THE EXTINCTION COEFFICIENT OF THE DYE INCREASES BY AT LEAST 50% IN ONE OF THE WAVELENGTH REGIONS OF INTENSE DYE ABSORPTION; TO MOLECULARLY DISSOCIATE THE DYE PHYSICALLY INT HE IMAGEWISE EXPOSED AREAS FROM THE MOLECULARLY ASSOCIATED FORM TO THE MOLECULARYLY DISSOCIATED FORM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |