US1830686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical furnace
Assignee: Hughes Tool Co
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Filing: 1929-01-18
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Granted: 1931-11-03
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Expires: 1949-01-18
Abstract
No abstract record available.
Inventors
- 👤 Gorham W Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B7/00; H05B7/18; H05B7/22; Y; Y10; Y10S; Y10S164/00; Y10S164/07
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) | 1934-11-02 | 1935-05-04 | 1935-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-02 | 1939-05-04 | 1939-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-02 | 1943-05-04 | 1943-11-03 | $7700.00 | Window Closed / Lapsed |