US2604358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning furnace checker works
Assignee: United States Steel Corp
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Filing: 1948-04-22
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Granted: 1952-07-22
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Expires: 1968-04-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
F; F27; F27D; F27D25/00; F27D25/008; F27B; F27B3/00; F27B3/10; F27B3/26; F27B3/263; F27D3/00; F27D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |