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Patent US2603884A successfully refreshed from Google Patents.
US2603884A
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Elementary induction coil instruction device
Assignee: Individual
•
Filing: 1949-12-19
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Granted: 1952-07-22
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Expires: 1969-12-19
Abstract
No abstract record available.
Inventors
- 👤 Harry M Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:14
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/06; G09B23/18; G09B23/182
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1998178A
Cited
US2084302A
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US2200060A
Cited
US2203594A
Cited
US2236217A
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US2515278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |