Patent US2420590A successfully refreshed from Google Patents.
US4140022B1
Expired / Lapsed
US
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Acoustic imaging apparatus
Assignee: HP Inc
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Filing: 1977-12-20
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Granted: 1995-05-16
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Expires: 1997-12-20
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Maslak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:33
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/06; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8909; G01S15/8915; G01S15/8918; G01S7/00; G01S7/52; G01S7/52017; G01S7/52046; G01S7/52053; G01S7/52057; G01S7/5206; G01S7/52063; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/346; G01S7/52023; G01S7/52033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |