Patent US3030737A successfully refreshed from Google Patents.
US3030737A
Expired / Lapsed
US
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Casing structure for furnace
Assignee: Chicago Fire Brick Co
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Filing: 1959-06-29
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Granted: 1962-04-24
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Expires: 1979-06-29
Abstract
No abstract record available.
Inventors
- 👤 George A Deming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:26
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/0003; F27D1/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2174871A
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US2264551A
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US2222576A
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US2235740A
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US2275933A
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US2622433A
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US2660050A
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US2762217A
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US2854842A
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US2870624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |