US1891531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging apparatus for metal-heating furnaces, and the like
Assignee: Siemens Industry Inc
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Filing: 1931-04-28
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Granted: 1932-12-20
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Expires: 1951-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jerome R George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:44
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/30; F27B9/38; F27D; F27D3/00; F27D3/06; F27D3/04
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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |