US4622977B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4622977B1 - - Google Patents
Assignee: Hitachi Ltd
•
Filing: 1984-11-28
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Granted: 1992-01-07
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Expires: 2004-11-28
Abstract
No abstract record available.
Inventors
- 👤 Namekawa Kouroku
- 👤 Koyano Akira
- 👤 Kasai Chihiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:58
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06; G; G01; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8979
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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |