Patent US1109533A successfully refreshed from Google Patents.
US1109533A
Expired / Lapsed
US
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Machine for removing slag, ash, or other residue from the retorts of zinc-furnaces.
Assignee: Individual
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Filing: 1911-02-14
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Granted: 1914-09-01
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Expires: 1931-02-14
Abstract
No abstract record available.
Inventors
- 👤 Edward W Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
F; F27; F27D; F27D25/00; F27D25/001
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) | 1917-08-31 | 1918-03-02 | 1918-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1921-08-31 | 1922-03-02 | 1922-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1925-08-31 | 1926-03-02 | 1926-09-01 | $7700.00 | Window Closed / Lapsed |