US2420846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube for generating oscillations
Assignee: Hartford National Bank and Trust Co
•
Filing: 1943-03-23
•
Granted: 1947-05-20
•
Expires: 1963-03-23
Abstract
No abstract record available.
Inventors
- 👤 Strutt Maximiliaan Julius Otto
- 👤 Ziel Aldert Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:54
CPC Classifications
H; H03; H03B; H03B13/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2026892A
Cited
US1955126A
Cited
US1920863A
Cited
US2053268A
Cited
US2086904A
Cited
US2164595A
Cited
US2173193A
Cited
US2194547A
Cited
US2185693A
Cited
US2185684A
Cited
US2250529A
Cited
US2250527A
Cited
US2250528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |