Patent US2429520A successfully refreshed from Google Patents.
US2429520A
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US
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Multiple brick furnace roof structure including individual facing blocks
Assignee: Mcfeely Brick Co
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Filing: 1944-07-15
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Granted: 1947-10-21
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Expires: 1964-07-15
Abstract
No abstract record available.
Inventors
- 👤 James E Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:40
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/025; F27D1/021; F27D1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1648363A
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US1410729A
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US1666284A
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US1683963A
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US1705965A
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US1698395A
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US2068863A
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US2119779A
Cited
US2299102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |