US2694526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heating system
Assignee: Vapor Heating Corp
•
Filing: 1951-04-05
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Granted: 1954-11-16
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Expires: 1971-04-05
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
2026-10-31 05:12
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0036; F; F24; F24D; F24D3/00; F24D3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1737075A
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US2005852A
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US2081831A
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FR809112A
Cited
US2240731A
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US2373731A
Cited
US2290347A
Cited
US2345277A
Cited
US2332149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |