Patent US2942133A successfully refreshed from Google Patents.
US2942133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron multipliers
Assignee: Electrical and Musical Industries Ltd
•
Filing: 1954-06-03
•
Granted: 1960-06-21
•
Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Mcgee James Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:02
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24; H01J43/243; H01J29/00; H01J29/02; H01J29/023; H01J29/10; H01J29/36; H01J29/38; H01J29/385; H01J29/39; H01J29/44; H01J29/45; H01J29/458; H01J31/00; H01J31/08; H01J31/26; H01J31/48; H01J31/49; H01J31/50; H01J31/506; H01J31/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2254617A
Cited
US2237679A
Cited
FR883415A
Cited
US2443547A
Cited
US2612610A
Cited
US2645734A
Cited
US2727182A
Cited
US2836755A
Cited
US2821637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |