Patent US3128198A successfully refreshed from Google Patents.
US3128198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoxerography
Assignee: Eastman Kodak Co
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Filing: 1961-06-21
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Granted: 1964-04-07
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 William J Dulmage
- 👤 William A Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:41
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A COPYING PROCESS COMPRISING IMAGEWISE HEATING SO AS TO PRODUCE A PATTERN OF HEATED AND UNHEATED AREAS THEREON, THE OUTER SURFACE OF A HIGH ELECTRIC RESISTANCE LAYER COATED ON A SHEET OF PAPER WHICH OUTER SURFACE AT ROOM TEMPERATURE ACCEPTS AND STORES AN ELECTROSTATIC CHARGE EXCEPT AFTER BEING HEATED, THEN SUBSTANTIALLY UNIFORMLY APPLYING ELECTROSTATIC CHARGES TO SAID OUTER SURFACE TO DEPOSIT CHARGES ON THE UNHEATED AREAS, AND THEN WITH SAID SURFACE COOLED AT LEAST TO THE TEMPERATURE AT WHICH XEROGRAPHIC TONER WILL NOT FUSE TO THE AREAS TO WHICH IT IS NOT ELECTROSTATICALLY ATTRACTED XEROGRAPHICALLY TONING THE SURFACE IN ACCORDANCE WITH THE CHARGE IMAGE.
Claim 2
Dependent Claim
104 words
A COPYING PROCESS COMPRISING IMAGEWISE HEATING SO AS TO PRODUCE A PATTERN OF HEATED AND UNHEATED AREAS THEREON, THE OUTER SURFACE OF A HIGH ELECTRIC RESISTANCE LAYER COATED ON A SHEET OF PAPER WHICH OUTER SURFACE AT ROOM TEMPERATURE ACCEPTS AND STORES AN ELECTROSTATIC CHARGE EXCEPT AFTER BEING HEATED, THEN SUBSTANTIALLY UNIFORMLY APPLYING ELECTROSTATIC CHARGES TO SAID OUTER SURFACE TO DEPOSIT CHARGES ON THE UNHEATED AREAS, AND THEN WITH SAID SURFACE COOLED AT LEAST TO THE TEMPERATURE AT WHICH XEROGRAPHIC TONER WILL NOT FUSE TO THE AREAS TO WHICH IT IS NOT ELECTROSTATICALLY ATTRACTED XEROGRAPHICALLY TONING THE SURFACE IN ACCORDANCE WITH THE CHARGE IMAGE.
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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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |