Patent US3496931A successfully refreshed from Google Patents.
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 17:15
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267; A61B1/2676; A61B1/06; A61B1/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US951285A
Cited
US1286083A
Cited
US2544914A
Cited
DE811853C
Cited
CH295527A
Cited
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 |