US2952791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam lens
Assignee: BBC Brown Boveri AG Germany
•
Filing: 1958-09-03
•
Granted: 1960-09-13
•
Expires: 1978-09-03
Abstract
No abstract record available.
Inventors
- 👤 Wideroe Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:25
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/08; G21K1/093
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2267752A
Cited
US2444073A
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US2515926A
Cited
US2464419A
Cited
US2555850A
Cited
US2892962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |