US4648892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making optical shield for a laser catheter
Assignee: Massachusetts Institute of Technology
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Filing: 1985-03-22
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Granted: 1987-03-10
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Expires: 2005-03-22
Abstract
Abstract A method of forming an optical shield for a laser catheter is disclosed in which a rod of light transmissive material is optically polished and inserted into a tube of similar material and fused and the distal end of the rod is cut and the assembly is optically polished at the distal end.
Inventors
- 👤 Carter Kittrell
- 👤 Gary B. Hayes
- 👤 Michael S. Feld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:09
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4296; A; A61; A61B; A61B17/00; A61B17/22; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B2018/00636; G02B6/26; G02B6/35; G02B6/3502; G02B6/3504; G02B6/3508; G02B6/351; G02B6/3512; G02B6/3516; G02B6/354; G02B6/3544; G02B6/3548; G02B6/3598
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A method of making an optical shield for a laser catheter wherein pieces of light transparent material are bonded together comprising the steps of: (a) forming a rod from one piece of said material, said rod having an outer diameter; (b) polishing one end of the rod; (c) forming a tube having an inner diameter about equal to the outer diameter of the rod; (d) inserting the polished end of the rod into the tube; (e) bonding the rod and tube at the juncture of each to join the two together; (f) removing any excess rod not inserted in the tube; and (g) polishing the portion of the tube and rod at the exposed removed end.
Claim 2
Independent Claim
116 words
A method of making an optical shield for a laser catheter wherein pieces of light transparent material are bonded together comprising the steps of: (a) forming a rod from one piece of said material, said rod having an outer diameter; (b) polishing one end of the rod; (c) forming a tube having an inner diameter about equal to the outer diameter of the rod; (d) inserting the polished end of the rod into the tube; (e) bonding the rod and tube at the juncture of each to join the two together; (f) removing any excess rod not inserted in the tube; and (g) polishing the portion of the tube and rod at the exposed removed end.
Claim 3
Dependent Claim
30 words
The method of claim 1 wherein a butt joint, matching conical joint or step change in the inner tube diameter is provided where the rod is joined to the tube.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein the rod is solid and a metal band is used to reinforce the bond between said solid rod and said tube.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein a heat source is used for bonding the said pieces.
Claim 6
Dependent Claim
15 words
The method of claim 3 wherein the heat source comprises a torch or a laser.
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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) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |