Patent US1213616A successfully refreshed from Google Patents.
US1213616A
Expired / Lapsed
US
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Means for producing, controlling, and utilizing electric currents.
Assignee: Individual
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Filing: 1912-06-22
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Granted: 1917-01-23
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Expires: 1932-06-22
Abstract
No abstract record available.
Inventors
- 👤 Charles Edgar Fritts
- 👤 Josephine H Fritts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:30
CPC Classifications
G; G11; G11B; G11B7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-01-23 | 1920-07-24 | 1921-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-01-23 | 1924-07-24 | 1925-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-01-23 | 1928-07-24 | 1929-01-23 | $7700.00 | Window Closed / Lapsed |