US2654592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace
Assignee: FOAMROCK Corp
•
Filing: 1950-10-25
•
Granted: 1953-10-06
•
Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US680613A
Cited
US822929A
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US1088974A
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US1895795A
Cited
US2157254A
Cited
US2137185A
Cited
US2301017A
Cited
US2430601A
Cited
US2584808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |