Patent US3434453A successfully refreshed from Google Patents.
US3434453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating device
Assignee: Hottinger Bruel and Kjaer GmbH
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Filing: 1966-09-12
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Granted: 1969-03-25
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Expires: 1986-09-12
Abstract
No abstract record available.
Inventors
- 👤 Karl Felgner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:56
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/02; G01D13/04; G01D13/10; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18528; Y10T74/19; Y10T74/1987; Y10T74/19879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544582A
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US561702A
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US1362842A
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US1473493A
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CH151825A
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US3030016A
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US3057215A
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US3268168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |