US4263030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing an optical waveguide material
Assignee: Mitsubishi Materials Corp
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Filing: 1979-11-07
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Granted: 1981-04-21
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Expires: 1999-11-07
Abstract
Abstract In forming an optical waveguide, a method of passing a hydrogen free vapor containing a compound consisting of C,N,O,S, or Se and at least one halogen therewith between a silica core and spaced cladding material prior to heat fusing said core and cladding material together.
Inventors
- 👤 Ryuji Kobayashi
- 👤 Kuniaki Wakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:02
CPC Classifications
C; C03; C03C; C03C23/00; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/01205; C03B37/01211; C03B37/02; C03B37/025; C03B37/027; Y; Y10; Y10S; Y10S65/00; Y10S65/15; Y10S65/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
In the method of producing an optical waveguide material which comprises inserting a silica glass core material into a silica glass cladding material previously mechanically or chemically polished or heat treated respectively, making said core material and said cladding material fused by heating and pulling said fused core material and cladding material, improvements comprising passing a hydrogen-free compound containing at least one selected from the group consisting of C, N, O, S, Se and at least one of halogens in a vapor state through the clearance between said core material inserted and said cladding material prior to fusion thereof and vapor-phase treating the surfaces of said core material and said cladding material with said hydrogen-free compound under heating up to a high temperature.
Claim 2
Dependent Claim
123 words
In the method of producing an optical waveguide material which comprises inserting a silica glass core material into a silica glass cladding material previously mechanically or chemically polished or heat treated respectively, making said core material and said cladding material fused by heating and pulling said fused core material and cladding material, improvements comprising passing a hydrogen-free compound containing at least one selected from the group consisting of C, N, O, S, Se and at least one of halogens in a vapor state through the clearance between said core material inserted and said cladding material prior to fusion thereof and vapor-phase treating the surfaces of said core material and said cladding material with said hydrogen-free compound under heating up to a high temperature.
Claim 3
Dependent Claim
100 words
A method of producing an optical waveguide material as claimed in claim 1, wherein said hydrogen-free compound is composed of one selected from the group consisting of CF 4 , CCl 4 , C 2 Cl 4 , CBr 4 , CCl 2 F 2 , CClF 3 , SF 6 , SCl 4 , S 2 Br 2 , SOF 2 , SOCl 2 , SO 2 Cl 2 , SeF 6 , SeCl 4 , Se 2 Br 2 , SeOCl 2 , SeOF 2 , OF 2 , N 3 F, and F 2 N 4 .
Claim 4
Dependent Claim
25 words
A method of producing an optical waveguide material as claimed in claim 1, wherein said vapor-phase treating temperature is in the range of 500°-1600° C.
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) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |