Patent US4308318A successfully refreshed from Google Patents.
US4308318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rub resistant ribbon for non-impact printing
Assignee: IBM Information Products Corp
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Filing: 1980-10-24
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Granted: 1981-12-29
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Expires: 2000-10-24
Abstract
Abstract A ribbon for non-impact printing comprising an electrically conductive substrate and a transfer layer which comprises a polymerized fatty acid polyamide.
Inventors
- 👤 William J. Weiche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31725
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A ribbon for non-impact printing comprising an electrically conductive substrate and a transfer layer which comprises coloring material and a polymerized fatty acid polyamide.
Claim 2
Dependent Claim
24 words
A ribbon for non-impact printing comprising an electrically conductive substrate and a transfer layer which comprises coloring material and a polymerized fatty acid polyamide.
Claim 3
Dependent Claim
23 words
A ribbon as claimed in claim 1 wherein the electrically conductive substrate is a polycarbonate resin containing electrically conductive particles of carbon black.
Claim 4
Dependent Claim
30 words
A ribbon as claimed in claim 1 wherein the transfer layer is applied to the substrate by dissolving the transfer layer in a solvent and applying it as a coating.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |