US2574925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system control
Assignee: Vapor Heating Corp
•
Filing: 1948-08-26
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Granted: 1951-11-13
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Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Timothy J Lehane
- 👤 Lester E Haskett
- 👤 Edward W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:29
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/10; F24D19/1084; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/27539
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |