US3682683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer medium and process of making
Assignee: International Business Machines Corp
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Filing: 1969-11-12
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Granted: 1972-08-08
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Expires: 1989-11-12
Abstract
Abstract A TRANSFER MEDIUM SUITABLE FOR USE, FOR EXAMPLE, AS A TYPERWRITER RIBBON IS FORMED BY COATING A MIXTURE OF INK AND RESIN CONTAINED IN A VOLATILE ORGANIC SOLVENT ON A POLYMER FILM AND HEATING TO REMOVE THE SOLVENT. THE INK, COMPRISING COLORING MATERIAL DISPERSED IN A VEHICLE, THE RESIN AND THE SOLVENT ARE SELECTED SUCH THAT THE INK IS PREFERENTIALLY SOLUBILIZED IN THE SOLVENT. DURING THE EVAPORATION OF THE SOLVENT, THIS RESULTS IN THE INK BECOMING CONCENTRATED AT THE EVAPORAING SURFACE TO PRODUCE A TRANSFER MEDIUM HAVING AN EXPOSED, INK RICH SURFACE.
Inventors
- 👤 Donald L Elbert
- 👤 Hugh T Findlay
- 👤 William H Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:08
CPC Classifications
B; B41; B41J; B41J31/00; B41M; B41M5/00; B41M5/10; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |