Patent US2603728A successfully refreshed from Google Patents.
US2603728A
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Sensitive control and indicating instrument
Assignee: EFFIE B MELCHIOR
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Filing: 1946-10-11
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Granted: 1952-07-15
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Expires: 1966-10-11
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Melchior
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:55
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/02; G01D13/04; G01D13/06; G01L; G01L27/00; G01L27/002; G01L27/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US747297A
Cited
US1258161A
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US1290928A
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US1629710A
Cited
US1860678A
Cited
US2058641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |