Patent US2494425A successfully refreshed from Google Patents.
US2494425A
Expired / Lapsed
US
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Electrolytically polished graphite anode
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-07-02
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Granted: 1950-01-10
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Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Bakker Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:24
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25B; C25B11/00; C25B11/04; C25B11/042; C25B11/043; H; H01; H01J; H01J1/00; H01J2893/00; H01J2893/0048; H01J2893/0051
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
AN ION DISCHARGE TUBE COMPRISING AN ELECTROLYTICALLY POLISHED GRAPHITE ANODE.
Claim 2
Dependent Claim
10 words
AN ION DISCHARGE TUBE COMPRISING AN ELECTROLYTICALLY POLISHED GRAPHITE ANODE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |