Patent US2538785A successfully refreshed from Google Patents.
US2471947A
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US
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Impulse generator for telemetering systems
Assignee: Howe & Fant Inc
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Filing: 1945-06-04
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Granted: 1949-05-31
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Expires: 1965-06-04
Abstract
No abstract record available.
Inventors
- 👤 Gabriel M Giannini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/18; G08C19/20; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555; Y10T74/1556
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US795739A
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US1865389A
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GB515212A
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US2348525A
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US2414688A
Cited
US2371511A
Cited
US2424130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |