US2835838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: US Philips Corp
•
Filing: 1954-07-12
•
Granted: 1958-05-20
•
Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Gier Johannes De
- 👤 Niklas Wilfrid Franz Ko Johann
- 👤 Alphonsus Petrus Van Rooy
- 👤 Nienhuis Willem Fokko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:25
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2152825A
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US2209159A
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US2225901A
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US2223040A
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US2306663A
Cited
US2233299A
Cited
US2389903A
Cited
US2490308A
Cited
US2476060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |