Patent US2729396A successfully refreshed from Google Patents.
US2729396A
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Electronically rebalanced temperature sensing bridge
Assignee: Vapor Heating Corp
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Filing: 1951-09-12
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Granted: 1956-01-03
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Expires: 1971-09-12
Abstract
No abstract record available.
Inventors
- 👤 Charles E Impey
- 👤 Joseph A Christ
- 👤 Edward W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:12
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2148491A
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US2135513A
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US2246575A
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US2362977A
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US2547933A
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US2603422A
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US2579716A
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US2574925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |