Patent US4216767B1 successfully refreshed from Google Patents.
US4216767B1
Expired / Lapsed
US
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Endoscope with closed pressurized inner cavity
Assignee: Machida Endoscope Co Ltd
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Filing: 1978-02-15
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Granted: 1983-12-20
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Expires: 1998-02-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:48
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/12; A61B1/121; A61B1/125; A61B1/00163; A61B1/00165
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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |