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US2873916A
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Steam heating system with alternative thermostat control
Assignee: Vapor Heating Corp
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Filing: 1954-06-18
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Granted: 1959-02-17
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Expires: 1974-06-18
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Lehane
- 👤 William M Smith
- 👤 Robert D Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:30
CPC Classifications
F; F24; F24D; F24D1/00; B; B61; B61D; B61D27/00; B61D27/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1417739A
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US1885479A
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US2129638A
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US2271778A
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US2274736A
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US2518996A
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US2701128A
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |