US2804269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outdoor temperature compensated control apparatus for heating systems
Assignee: Landis and Gyr AG
•
Filing: 1951-11-27
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Granted: 1957-08-27
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Expires: 1971-11-27
Abstract
No abstract record available.
Inventors
- 👤 Galavics Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/40; F24H9/45; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR777297A
Cited
US2137059A
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US2057309A
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US2192144A
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US2474798A
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US2375988A
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US2553060A
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US2547933A
Cited
US2603422A
Cited
US2564416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |