Patent US2986668A successfully refreshed from Google Patents.
US2986668A
Expired / Lapsed
US
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Cathode ray tube optical system
Assignee: General Dynamics Corp
•
Filing: 1957-12-23
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Granted: 1961-05-30
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Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 Dan J Haflinger
- 👤 Charles R Corpew
- 👤 Howard A Gutzmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2260313A
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US2407905A
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US2464562A
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US2431113A
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US2525737A
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US2623190A
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GB771066A
Cited
US2834902A
Cited
US2761988A
Cited
US2769116A
Cited
US2888606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |