US2897391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Studded electrode and method of manufacture
Assignee: Individual
•
Filing: 1957-04-02
•
Granted: 1959-07-28
•
Expires: 1977-04-02
Abstract
No abstract record available.
Inventors
- 👤 George B Erskine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:29
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1314816A
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US2734118A
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US2245624A
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GB613145A
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US2360279A
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US2348216A
Cited
US2476060A
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US2614548A
Cited
US2565533A
Cited
US2701320A
Cited
US2840739A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |