Patent US2558878A successfully refreshed from Google Patents.
US2558878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode with molded insulation
Assignee: Mycalex Corp of America
•
Filing: 1946-03-05
•
Granted: 1951-07-03
•
Expires: 1966-03-05
Abstract
No abstract record available.
Inventors
- 👤 Henry M Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:12
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32; H01J5/40; H01J5/42; H01J2893/00; H01J2893/0033; H01J2893/0034
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US732812A
Cited
US1184813A
Cited
US1456110A
Cited
US1888071A
Cited
US2194886A
Cited
US2307561A
Cited
US2305150A
Cited
US2429955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-02 | 1955-01-01 | 1955-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-02 | 1959-01-01 | 1959-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-02 | 1963-01-01 | 1963-07-03 | $7700.00 | Window Closed / Lapsed |