Patent US3425531A successfully refreshed from Google Patents.
US3425531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon supply unit
Assignee: Unisys Corp
•
Filing: 1965-12-01
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Granted: 1969-02-04
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Expires: 1985-12-01
Abstract
No abstract record available.
Inventors
- 👤 Jerome R Fuld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
B; B41; B41J; B41J32/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1707767A
Cited
US1944023A
Cited
US1871232A
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US1871236A
Cited
US1932401A
Cited
US1975782A
Cited
US2873015A
Cited
US2999578A
Cited
US3367050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |