US2856772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical velocity meter
Assignee: Unisys Corp
•
Filing: 1955-10-27
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Granted: 1958-10-21
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Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Louis F Strihafka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:33
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/005; G01C19/00; G01C19/02; G01P; G01P15/00; G01P15/14; G01P3/00; G01P3/62; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734278A
Cited
US2443748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-20 | 1962-04-21 | 1962-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-20 | 1966-04-21 | 1966-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-20 | 1970-04-21 | 1970-10-21 | $7700.00 | Window Closed / Lapsed |