Patent US2923590A successfully refreshed from Google Patents.
US2923590A
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US
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Production of permanent picture and writing characters by means of electron beams
Assignee: WC Heraus GmbH and Co KG
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Filing: 1953-12-29
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Granted: 1960-02-02
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Expires: 1973-12-29
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:45
CPC Classifications
G; G03; G03G; G03G17/00; B; B41; B41C; B41C1/00; B41C1/10; B41C1/1041; B41M; B41M5/00; B41M5/24; B41M5/26; G03C; G03C5/00; G03C5/16; H; H01; H01J; H01J29/00; H01J29/86; H01J29/865; H01J37/00; H01J37/30; H01J37/301; H04; H04N; H04N1/00; H04N1/23; H04N5/00; H04N5/76; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1779794A
Cited
GB391006A
Cited
US2478681A
Cited
US2630484A
Cited
US2570124A
Cited
US2640948A
Cited
US2786156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |