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Patent US2989702A successfully refreshed from Google Patents.
US2989702A
Expired / Lapsed
US
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Electronic generator of symbols or characters or the like
Assignee: Hoffman Electronics Corp
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Filing: 1958-04-03
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Granted: 1961-06-20
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Richard L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:16
CPC Classifications
G; G09; G09G; G09G1/00; G09G1/06; G09G1/08; G09G1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803815A
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US2402989A
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US2552761A
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US2594731A
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US2798153A
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US2774932A
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US2842664A
Cited
US2903615A
Cited
US2837652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |