US2538873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge tube
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-03-11
•
Granted: 1951-01-23
•
Expires: 1966-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jonker Johan Lodewijk Hendrik
- 👤 Gall Bernardus Octavianu Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1719988A
Cited
US1618499A
Cited
US1700454A
Cited
US2107945A
Cited
US2175345A
Cited
US2199879A
Cited
US2389060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |