Patent US2857153A successfully refreshed from Google Patents.
US2857153A
Expired / Lapsed
US
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Water sealing furnace section
Assignee: Surface Combustion Corp
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Filing: 1954-10-04
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Granted: 1958-10-21
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Philip L Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:58
CPC Classifications
F; F27; F27B; F27B9/00; F27B9/12; F27B2009/124; F27D; F27D9/00; F27D2009/007; F27D2009/0081; F27D2009/0083; F27D2009/0086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1170989A
Cited
US1536650A
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US1709160A
Cited
CH157880A
Cited
US2064532A
Cited
US2063784A
Cited
GB470330A
Cited
US2126534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |