Patent US2840738A successfully refreshed from Google Patents.
US2840738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color television tube
Assignee: Westinghouse Electric Corp
•
Filing: 1954-05-05
•
Granted: 1958-06-24
•
Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Andrew P Kruper
- 👤 William L Roberts
- 👤 George A Kuntz
- 👤 Charles H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22; H04N9/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB582892A
Cited
USRE23672E
Cited
US2573777A
Cited
US2606246A
Cited
US2754357A
Cited
US2646521A
Cited
US2619608A
Cited
US2755410A
Cited
US2745037A
Cited
US2723361A
Cited
US2759995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |