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Patent US3435820A successfully refreshed from Google Patents.
US3435820A
Expired / Lapsed
US
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Illuminating endoscope with detachable shield
Assignee: Individual
•
Filing: 1966-02-16
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Granted: 1969-04-01
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Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Stanley Taub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:55
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/24; A61B1/06; A61B1/0661; A61B1/0676; A61B1/267; A61B1/2673
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE212474C
Cited
US1292326A
Cited
FR657331A
Cited
GB403896A
Cited
US1945380A
Cited
US1990972A
Cited
US2690744A
Cited
US2936753A
Cited
US3349764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |