Patent US3474889A successfully refreshed from Google Patents.
US3474889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card clamp for typewriter platens
Assignee: Friden Inc
•
Filing: 1967-04-27
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Granted: 1969-10-28
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Expires: 1987-04-27
Abstract
No abstract record available.
Inventors
- 👤 Hugh St Lawrence Dannatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:29
CPC Classifications
B; B41; B41J; B41J13/00; B41J13/10; B41J13/12; B41J19/00; B41J19/76; B41J19/78; B41J19/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303879A
Cited
US687000A
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US980689A
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US927203A
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US1582031A
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US1749835A
Cited
US1945894A
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US2023507A
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US2841264A
Cited
US3208575A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |