US2602903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: Individual
•
Filing: 1950-11-13
•
Granted: 1952-07-08
•
Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 Elof K Karlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:45
CPC Classifications
H; H01; H01J; H01J29/00; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934821A
Cited
US2172775A
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DE718293C
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US2296908A
Cited
US2339256A
Cited
US2335287A
Cited
US2422937A
Cited
US2460608A
Cited
US2446791A
Cited
US2520190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |