Patent US3675984A successfully refreshed from Google Patents.
US3675984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact endoscope with stray light trap
Assignee: Bpifrance Financement SA
•
Filing: 1971-05-17
•
Granted: 1972-07-11
•
Expires: 1991-05-17
Abstract
Abstract THE INVENTION REFERS TO IMPROVEMENTS TO CONTACT ENDOSCOPES. THE INVENTION PURPOSE IS TO PROVIDE A CONTACT ENDOSCOPE FEATURING A CYLINDRICAL HOLLOW LIGHT COLLECTING MEMBER MADE OF TRANSPARENT MATERIAL AND HAVING SMOOTH INTERNAL AND FROSTED EXTERNAL SURFACES, A SIGHT (4) FASTENED AT ONE OF THE CYLINDRICAL COLLECTOR (1) EXTREMITES AND A LIGHT GUIDE (3) LOCATED CO-AXIALLY TO THE OTHER EXTREMITY OF SAID COLLECTOR AND HAVING A VIEWING DISTAL FACE, THIS ENDOSCOPE BEING CHARACTERIZED IN THAT AN OPTICAL UNIT (31) TO 36) ACTING AS A STRAY LIGHT TRAP, IS LOCATED INSIDE THE CYLINDRICAL COLLECTOR (1). THE INVENTION APPLIES TO DIRECT INSPECTION THROUGH ENDOSCOPES.
Inventors
- 👤 Jacques Claude Vulmiere
- 👤 Huguette Nelly Vulmiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:49
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/005; A; A61; A61B; A61B1/00; A61B1/00163; A61B1/00165; Y; Y10; Y10S; Y10S385/00; Y10S385/902
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |