Patent US2605432A successfully refreshed from Google Patents.
US2605432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indirectly heated cathode structure
Assignee: Electrons Inc
•
Filing: 1949-10-19
•
Granted: 1952-07-29
•
Expires: 1969-10-19
Abstract
No abstract record available.
Inventors
- 👤 Earle K Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1925701A
Cited
US1895361A
Cited
US2097297A
Cited
US2065997A
Cited
US2112718A
Cited
US2246176A
Cited
US2297721A
Cited
US2307979A
Cited
US2497911A
Cited
US2459997A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |