Patent US2627347A successfully refreshed from Google Patents.
Patent US3051451A successfully refreshed from Google Patents.
US3051451A
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Thermostat and control circuit for heating, air conditioning and ventilating system
Assignee: Lennox Industries Inc
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Filing: 1958-09-15
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Granted: 1962-08-28
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 Henry C Bierwirth
- 👤 Norman L Rutgers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:09
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/2754; F; F24; F24F; F24F11/00; F24F11/30; F24F11/88
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190808412A
Cited
US1931464A
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US1989278A
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US1998534A
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US2094309A
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US2024385A
Cited
US2112998A
Cited
US2216551A
Cited
US2210890A
Cited
US2334445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |