US2641207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace arch construction
Assignee: MH Detrick Co
•
Filing: 1948-12-06
•
Granted: 1953-06-09
•
Expires: 1968-12-06
Abstract
No abstract record available.
Inventors
- 👤 Charles F Pollen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:58
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/025; F27D1/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1601485A
Cited
US1571561A
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US1738527A
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US1781724A
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US2200372A
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US2304170A
Cited
US2372214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |