US2474798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat regulating apparatus
Assignee: Landis and Gyr AG
•
Filing: 1941-01-18
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Granted: 1949-06-28
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Expires: 1961-01-18
Abstract
No abstract record available.
Inventors
- 👤 Amsler Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:54
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/27535; G05D23/2754
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999053A
Cited
US2083932A
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US2183874A
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US1997559A
Cited
US2063613A
Cited
US2171803A
Cited
GB499235A
Cited
US2344991A
Cited
CH212457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |