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Patent US2547750A successfully refreshed from Google Patents.
US2547750A
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Programmed temperature control using a wheatstone bridge
Assignee: Schneider Electric Buildings Americas Inc
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Filing: 1947-04-03
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Granted: 1951-04-03
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Expires: 1967-04-03
Abstract
No abstract record available.
Inventors
- 👤 Donald L Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:44
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1902; G05D23/1904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2325094A
Cited
US2135513A
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US2290091A
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US2250899A
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US2394061A
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US2471457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |