US2422685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant heating for buildings
Assignee: CLAY PRODUCTS ASS
•
Filing: 1944-03-27
•
Granted: 1947-06-24
•
Expires: 1964-03-27
Abstract
No abstract record available.
Inventors
- 👤 George F Keck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/06; F24D5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US836017A
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FR375103A
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US1065762A
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US1487247A
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US1521922A
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US1745765A
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US1995481A
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US2117712A
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FR810186A
Cited
US2192567A
Cited
US2181814A
Cited
US2301672A
Cited
US2316319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |