US2545909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for applying emission material to cathodes
Assignee: General Electric Co
•
Filing: 1948-12-22
•
Granted: 1951-03-20
•
Expires: 1968-12-22
Abstract
No abstract record available.
Inventors
- 👤 William P Zabel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:00
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2363055A
Cited
US2422457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |