Patent US2980984A successfully refreshed from Google Patents.
US2980984A
Expired / Lapsed
US
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Art of fabricating electron tubes
Assignee: RCA Corp
•
Filing: 1957-08-19
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Granted: 1961-04-25
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Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 Merrald B Shrader
- 👤 Fred G Block
- 👤 Morris R Weingarten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:35
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/46; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0005; H01J2893/0006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736148A
Cited
US2164961A
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US2445934A
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US2758361A
Cited
US2580716A
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US2774194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |