US2861211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-stressed grids for electron tubes
Assignee: International Standard Electric Corp
•
Filing: 1955-05-31
•
Granted: 1958-11-18
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Brown Kenneth Stanley
- 👤 Basnett Thomas Nathaniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:40
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0015; H01J2893/0016
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2282392A
Cited
US2397233A
Cited
US2610387A
Cited
US2495259A
Cited
US2455863A
Cited
US2654940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |