Patent US2755792A successfully refreshed from Google Patents.
US2755792A
Expired / Lapsed
US
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Liquid heating and circulating systems
Assignee: JET HEET Inc
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Filing: 1953-07-03
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Granted: 1956-07-24
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Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 Charles J Van Hook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:13
CPC Classifications
F; F24; F24D; F24D3/00; F24D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US245416A
Cited
US700535A
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US809164A
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US873182A
Cited
FR32586E
Cited
US2609871A
Cited
US2553817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |