US2553393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace wall structure
Assignee: Laclede-Christy Co
•
Filing: 1945-09-12
•
Granted: 1951-05-15
•
Expires: 1965-09-12
Abstract
No abstract record available.
Inventors
- 👤 Herman W Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:52
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1489683A
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US2070547A
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DE548078C
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US1972838A
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US2127842A
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US2132517A
Cited
US2170233A
Cited
US2235740A
Cited
US2337208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |