US2924203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit for heat transfer liquid
Assignee: Cleaver Brooks Co
•
Filing: 1954-11-17
•
Granted: 1960-02-09
•
Expires: 1974-11-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Loebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:31
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/02; F28D7/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1765886A
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GB382971A
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US1980424A
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US2216809A
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US2291872A
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US2577856A
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US2656821A
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US2703565A
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US2625915A
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US2800307A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |