US2593038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air reheat control for heating system
Assignee: Vapor Heating Corp
•
Filing: 1949-03-17
•
Granted: 1952-04-15
•
Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Lehane
- 👤 Ira S Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:12
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CH142488A
Cited
US2143356A
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US2138505A
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US2135294A
Cited
US2234288A
Cited
US2323236A
Cited
US2328472A
Cited
US2478588A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |