Patent US2681448A successfully refreshed from Google Patents.
US3387986A
Expired / Lapsed
US
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Transfer medium for typing on non-receptive surfaces
Assignee: International Business Machines Corp
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Filing: 1965-04-01
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Granted: 1968-06-11
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Donald L Elbert
- 👤 William H Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:45
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31801; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2810661A
Cited
US3087832A
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US3036924A
Cited
US3061454A
Cited
US3214285A
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US3212913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |