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Patent US2874916A successfully refreshed from Google Patents.
US2874916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil holder
Assignee: Hydrometals Inc
•
Filing: 1954-05-05
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Granted: 1959-02-24
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Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur S Wallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:16
CPC Classifications
B; B21; B21C; B21C47/00; B21C47/28; B21C47/30; H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F41/06; H01F41/098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1088282A
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US1943084A
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US2097142A
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US2224639A
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US2365896A
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US2326092A
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US2426376A
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US2466977A
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US2654278A
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US2578953A
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US2658694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |