US3520587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic endoscope
Assignee: Olympus Corp
•
Filing: 1968-03-26
•
Granted: 1970-07-14
•
Expires: 1988-03-26
Abstract
No abstract record available.
Inventors
- 👤 Toshio Tasaki
- 👤 Teruo Ouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:59
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; G02B23/2415; A; A61; A61B; A61B1/00; A61B1/00163; A61B1/00165; A61B1/00174; A61B1/00177; A61B1/00193
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2975785A
Cited
US3020806A
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US3068772A
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US3011403A
Cited
US3090378A
Cited
US3028791A
Cited
US3143589A
Cited
US3414344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |