Patent US1589266A successfully refreshed from Google Patents.
US1589266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric induction furnace
Assignee: Individual
•
Filing: 1923-05-28
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Granted: 1926-06-15
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Expires: 1943-05-28
Abstract
No abstract record available.
Inventors
- 👤 David L Summey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:50
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/16; H05B6/20
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) | 1929-06-14 | 1929-12-14 | 1930-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-06-14 | 1933-12-14 | 1934-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-06-14 | 1937-12-14 | 1938-06-15 | $7700.00 | Window Closed / Lapsed |