US3496931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating endoscope with oval fiber optic channel
Assignee: Pilling Co
•
Filing: 1966-09-20
•
Granted: 1970-02-24
•
Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Henry N Pilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267; A61B1/2676; A61B1/06; A61B1/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US951285A
Cited
US1286083A
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US2544914A
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DE811853C
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CH295527A
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US3032031A
Cited
US3278283A
Cited
US3261350A
Cited
US3297022A
Cited
US3269387A
Cited
US3383192A
Cited
US3368552A
Cited
FR1483314A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |