US2581446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting means for vacuum electrodes
Assignee: Consolidated Engineering Co Inc
•
Filing: 1949-10-31
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Granted: 1952-01-08
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Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Charles F Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:18
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/027; H01J49/00; H01J49/02; H01J49/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |