US3392042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spongeous typewriter ribbon
Assignee: International Business Machines Corp
•
Filing: 1965-01-25
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Granted: 1968-07-09
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hugh T Findlay
- 👤 William H Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/10; B41J; B41J31/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249994; Y10T428/249995; Y10T428/249996; Y10T428/31504; Y10T428/31725; Y10T428/31728; Y10T428/31732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3037879A
Cited
US3336150A
Cited
US3102824A
Cited
US3324072A
Cited
US3287153A
Cited
US3330791A
Cited
US3337361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |