US4964710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable rigid endoscope
Assignee: LIGHTHOUSE IMAGING ACQUISITION LLC
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Filing: 1989-07-27
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Granted: 1990-10-23
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Expires: 2009-07-27
Abstract
Abstract An endoscope is provided with an objective lens system, an ocular lens and an intermediate relay lens system. The relay lens system is a hybrid system using both plastic and glass elements. The plastic elements comprise an even plurality (N) of axially aligned lenses each having a length of the same order as its diameter. Intermediate said plastic lenses are a plurality (N minus 1) of axially aligned glass plano cylinder, the end faces of which are polished.
Inventors
- 👤 Dennis C. Leiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:53
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; A; A61; A61B; A61B1/00; A61B1/002; G02B23/2446
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
44 words
An endoscope for viewing an object, said apparatus including a relay lens assembly, said assembly including: a plurality of axially aligned polymeric curved surface, spaced lenses; and a plurality of axially aligned plano glass cylinders with polished end faces positioned intermediate said spaced lenses.
Claim 2
Dependent Claim
44 words
An endoscope for viewing an object, said apparatus including a relay lens assembly, said assembly including: a plurality of axially aligned polymeric curved surface, spaced lenses; and a plurality of axially aligned plano glass cylinders with polished end faces positioned intermediate said spaced lenses.
Claim 3
Dependent Claim
21 words
The invention as defined in claim 1 wherein said lenses have a length which is of the order of their diameter.
Claim 4
Dependent Claim
12 words
The invention as defined in claim 1 wherein said lenses are molded.
Claim 5
Dependent Claim
17 words
The invention as defined in claim 1 wherein said lenses are made of two different polymeric materials.
Claim 6
Dependent Claim
27 words
The invention as defined in claim 1 wherein said lenses have a length which is of the order of their diameter, and wherein said lenses are molded.
Claim 7
Dependent Claim
38 words
The invention as defined in claim 1 wherein said lenses have a length which is of the order of their diameter and wherein said lenses are molded, and wherein said lenses are made of two different polymeric materials.
Claim 8
Dependent Claim
30 words
The invention as defined in claim 1 wherein said plurality of lenses is an even number (N), and wherein said plurality of cylinders is an odd number (N minus 1).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |