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US2699741A
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Removable arch section for industrial heating furnaces
Assignee: Laclede-Christy Co
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Filing: 1950-09-02
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Granted: 1955-01-18
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Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Edward W Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:27
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/02; F27D1/021; F27D2001/0046; F27D2001/005; F27D2001/1605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1309435A
Cited
US1284066A
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US1544154A
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US1718671A
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US1870615A
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US1885800A
Cited
US2457965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |