US3581376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of constructing a bent light-conducting tube
Assignee: Pilling Co
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Filing: 1969-07-17
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Granted: 1971-06-01
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Expires: 1989-07-17
Abstract
Abstract AN ILLUMINATING ENDOSCOPE IS PROVIDED WITH LIGHTCONDUCTING FIBERS CONTAINED IN A TUBE HAVING AN OVAL CROSS-SECTION. THE OVAL TUBE IS CONTAINED IN AN OVAL CHANNEL EXTENDING LENGTHWISE ALONG THE WALL OF THE ENDOSCOPE BORE, AND IS REMOVABLE FROM THE CHANNEL. THE CHANNEL IS OPEN THROUGHOUT THE PART OF ITS LENGTH WHERE THE BORE DIAMETER IS MINIMUM. TO FORM THE LIGHT-CONDUCTING TUBE, A CIRCULAR PORTION IS FORMED IN A METAL TUBE HAVING AN OVAL CROSS-SECTION, AND THE CIRCULAR PORTION IS THEN BENT AT A RIGHT ANGLE TO AVOID INTERFERENCE WITH THE TELESCOPIC APPARATUS AT THE PROXIMAL END OF THE ENDOSCOPE.
Inventors
- 👤 Henry N Pilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:56
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267; A61B1/2676; A61B1/00064; A61B1/0011; A61B1/06; A61B1/07; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801; Y10T29/49826; Y10T29/49861; Y10T29/49908
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |