US2698913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode structure
Assignee: US Philips Corp
•
Filing: 1951-11-29
•
Granted: 1955-01-04
•
Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 George A Espersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:32
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28; H01J23/00; H01J23/02; H01J23/04; H01J23/05; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12611; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1267827A
Cited
US2121589A
Cited
US2131204A
Cited
US2411601A
Cited
US2381012A
Cited
US2460119A
Cited
US2543728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |