Patent US3444390A successfully refreshed from Google Patents.
US3444390A
Expired / Lapsed
US
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Press impact sensor
Assignee: Hyde Park Electronics Inc
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Filing: 1968-01-12
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Granted: 1969-05-13
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Expires: 1988-01-12
Abstract
No abstract record available.
Inventors
- 👤 Victor S Breidenbach
- 👤 Patrick B Close
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
B; B21; B21J; B21J13/00; B30; B30B; B30B15/00; B30B15/28; G; G01; G01L; G01L1/00; G01L1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |