US2861208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination focusing and converging lens for multiple beam tubes
Assignee: RCA Corp
•
Filing: 1955-03-01
•
Granted: 1958-11-18
•
Expires: 1975-03-01
Abstract
No abstract record available.
Inventors
- 👤 Robert E Benway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:41
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/51; H01J29/50; H01J29/506; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2663821A
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US2661436A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |