US2991393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-transconductance cathode-ray tube
Assignee: US Philips Corp
•
Filing: 1959-06-26
•
Granted: 1961-07-04
•
Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Francken Jan Carel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:37
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/52; H01J29/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993457A
Cited
US2163210A
Cited
US2173498A
Cited
US2341764A
Cited
FR52296E
Cited
FR1089337A
Cited
US2919380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |