Patent US4497643A successfully refreshed from Google Patents.
US4497643A
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Optical fiber junction device and method of making the same
Assignee: SWCC Corp
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Filing: 1982-09-10
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Granted: 1985-02-05
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Expires: 2002-09-10
Abstract
Abstract There are disclosed an optical fiber junction device and a method of making the same. The method comprises the steps of providing a central inner pipe or rod of glass, arranging a plurality of optical fibers around the inner pipe or rod, and externally heating the optical fibers and the central inner pipe to form a thermally fused assembly having cores of a sectorial cross section. The inner pipe may include a tapered portion having a reduced diameter. The optical fibers may comprise optical fiber junction units each composed of a plurality of optical fibers.
Inventors
- 👤 Nobuo Kowata
- 👤 Naoshige Sasano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:51
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02042; G02B6/24; G02B6/26; G02B6/28; G02B6/2804; G02B6/2856; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A method of making an optical fiber junction device, comprising the steps of: providing a central inner pipe or rod of glass with an axial-tapered portion having a reduced diameter; arranging a plurality of optical fibers around said inner pipe or rod, said optical fibers being composed of a plurality of optical fiber junction units each having a plurality of optical fibers; externally heating said optical fibers and said central inner pipe or rod to form a thermally fused assembly having cores of a sectorial cross section.
Claim 2
Independent Claim
87 words
A method of making an optical fiber junction device, comprising the steps of: providing a central inner pipe or rod of glass with an axial-tapered portion having a reduced diameter; arranging a plurality of optical fibers around said inner pipe or rod, said optical fibers being composed of a plurality of optical fiber junction units each having a plurality of optical fibers; externally heating said optical fibers and said central inner pipe or rod to form a thermally fused assembly having cores of a sectorial cross section.
Claim 3
Independent Claim
78 words
A method of making an optical fiber junction device, comprising the steps of: providing a central inner pipe or rod of glass; arranging a plurality of optical fibers around said inner pipe or rod, said optical fibers being composed of a plurality of optical fiber junction units each having a plurality of optical fibers; and externally heating said optical fibers and said central inner pipe to form a thermally fused assembly having cores of a sectorial cross section.
Claim 4
Independent Claim
78 words
A method of making an optical fiber junction device, comprising the steps of: providing a central inner pipe or rod of glass; arranging a plurality of optical fibers around said inner pipe or rod, said optical fibers being composed of a plurality of optical fiber junction units each having a plurality of optical fibers; and externally heating said optical fibers and said central inner pipe to form a thermally fused assembly having cores of a sectorial cross section.
Claim 5
Independent Claim
61 words
A method of making an optical fiber junction device, comprising the steps of: preparing a plurality of optical fiber junction units by joining by fusion a plurality of optical fibers; arranging said optical fiber junction units radially around a central axis; and heating said optical fiber junction units to form a thermally fused assembly having cores of a sectorial cross section.
Claim 6
Independent Claim
61 words
A method of making an optical fiber junction device, comprising the steps of: preparing a plurality of optical fiber junction units by joining by fusion a plurality of optical fibers; arranging said optical fiber junction units radially around a central axis; and heating said optical fiber junction units to form a thermally fused assembly having cores of a sectorial cross section.
Claim 7
Dependent Claim
18 words
A method according to claim 3, wherein said plurality of optical fiber junction units have different outside diameters.
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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) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |