Patent US3475169A successfully refreshed from Google Patents.
US3475169A
Expired / Lapsed
US
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Process of electrostatically screening color cathode-ray tubes
Assignee: Zenith Electronics LLC
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Filing: 1965-08-20
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Granted: 1969-10-28
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Expires: 1985-08-20
Abstract
No abstract record available.
Inventors
- 👤 Howard G Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:37
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G13/00; G03G13/22; H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/221; H01J9/225; H01J9/227; H01J9/2276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2682478A
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US2787556A
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US3136909A
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US3146368A
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US3212887A
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US3329590A
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US3140176A
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US3337340A
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US3139340A
Cited
US3360450A
Cited
US3363552A
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 |