US4547088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Correctable thermal transfer printing ribbon
Assignee: IBM Information Products Corp
•
Filing: 1980-06-26
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Granted: 1985-10-15
•
Expires: 2000-06-26
Abstract
Abstract The ink layer of a thermal transfer printing ribbon is overcoated with a hold-off layer which serves to make the resulting printing more easily correctable. The hold-off layer operates by preventing penetration by the ink layer into the substrate being printed upon.
Inventors
- 👤 Meredith D. Shattuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:06
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/3825; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A ribbon for correctable thermal transfer printing, said ribbon comprising an ink layer and on top of said ink layer a thermoplastic hold-off layer which prevents penetration by the ink layer into a substrate being printed upon, wherein the hold-off layer comprises polyvinylpyrrolidone, poly(ethylene oxide), methyl vinyl ether/maleic acid copolymer, N-vinyl pyrrolidone/vinyl acetate copolymer or poly(ethylene glycol).
Claim 2
Dependent Claim
57 words
A ribbon for correctable thermal transfer printing, said ribbon comprising an ink layer and on top of said ink layer a thermoplastic hold-off layer which prevents penetration by the ink layer into a substrate being printed upon, wherein the hold-off layer comprises polyvinylpyrrolidone, poly(ethylene oxide), methyl vinyl ether/maleic acid copolymer, N-vinyl pyrrolidone/vinyl acetate copolymer or poly(ethylene glycol).
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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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |