US2879583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating electron discharge devices
Assignee: Cinema Television Ltd
•
Filing: 1955-12-13
•
Granted: 1959-03-31
•
Expires: 1975-12-13
Abstract
No abstract record available.
Inventors
- 👤 Booth George Arthur
- 👤 Krause Anthony Victor De Vere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:16
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/86; H01J29/88
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |