Patent US2534148A successfully refreshed from Google Patents.
US2534148A
Expired / Lapsed
US
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Combined radiant and air heating system
Assignee: Vapor Heating Corp
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Filing: 1947-06-21
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Granted: 1950-12-12
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Expires: 1967-06-21
Abstract
No abstract record available.
Inventors
- 👤 Edward A Russell
- 👤 Frost B Rutherford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:16
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0036; E; E06; E06B; E06B1/00; E06B1/70; E06B1/702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1131927A
Cited
US1521643A
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US1951521A
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US1913002A
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US2044733A
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US2179873A
Cited
US2213053A
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US2265536A
Cited
US2271778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |