Patent US1740796A successfully refreshed from Google Patents.
Patent US1564933A successfully refreshed from Google Patents.
US1564933A
Expired / Lapsed
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Temperature-compensated electrical measuring instrument
Assignee: Brown Instruments Co
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Filing: 1922-02-20
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Granted: 1925-12-08
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Expires: 1942-02-20
Abstract
No abstract record available.
Inventors
- 👤 Richard P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:44
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/38; H; H01; H01F; H01F7/00; H01F7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1928-12-07 | 1929-06-08 | 1929-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-12-07 | 1933-06-08 | 1933-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-12-07 | 1937-06-08 | 1937-12-08 | $7700.00 | Window Closed / Lapsed |