FI68605C - Sotroerform foer optisk vaogledare optiska fibrer producerade daerav och metod foer framstaellning av sotroerformen - Google Patents
Sotroerform foer optisk vaogledare optiska fibrer producerade daerav och metod foer framstaellning av sotroerformen Download PDFInfo
- Publication number
- FI68605C FI68605C FI812105A FI812105A FI68605C FI 68605 C FI68605 C FI 68605C FI 812105 A FI812105 A FI 812105A FI 812105 A FI812105 A FI 812105A FI 68605 C FI68605 C FI 68605C
- Authority
- FI
- Finland
- Prior art keywords
- coating
- blank
- glass
- viscosity
- soot
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000013307 optical fiber Substances 0.000 title description 3
- 238000007380 fibre production Methods 0.000 title 1
- 238000000576 coating method Methods 0.000 claims abstract description 60
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 239000011521 glass Substances 0.000 claims abstract description 55
- 239000004071 soot Substances 0.000 claims abstract description 55
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000006229 carbon black Substances 0.000 claims description 33
- 239000000835 fiber Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 23
- 229910005793 GeO 2 Inorganic materials 0.000 claims description 14
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 241000282887 Suidae Species 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000007596 consolidation process Methods 0.000 abstract description 4
- 230000007062 hydrolysis Effects 0.000 abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 33
- 239000011257 shell material Substances 0.000 description 25
- 230000002787 reinforcement Effects 0.000 description 17
- 239000011162 core material Substances 0.000 description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 229910052760 oxygen Inorganic materials 0.000 description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 229910052734 helium Inorganic materials 0.000 description 10
- 239000001307 helium Substances 0.000 description 9
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 9
- 239000010453 quartz Substances 0.000 description 9
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 8
- 239000002019 doping agent Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000000446 fuel Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 206010017076 Fracture Diseases 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000012681 fiber drawing Methods 0.000 description 3
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000287828 Gallus gallus Species 0.000 description 1
- 229910019213 POCl3 Inorganic materials 0.000 description 1
- 229910003902 SiCl 4 Inorganic materials 0.000 description 1
- 229910003910 SiCl4 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 210000003323 beak Anatomy 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 239000003258 bubble free glass Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005816 glass manufacturing process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
- G02B6/03605—Highest refractive index not on central axis
- G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0281—Graded index region forming part of the central core segment, e.g. alpha profile, triangular, trapezoidal core
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/02—Pure silica glass, e.g. pure fused quartz
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/20—Doped silica-based glasses doped with non-metals other than boron or fluorine
- C03B2201/28—Doped silica-based glasses doped with non-metals other than boron or fluorine doped with phosphorus
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/80—Feeding the burner or the burner-heated deposition site
- C03B2207/85—Feeding the burner or the burner-heated deposition site with vapour generated from liquid glass precursors, e.g. directly by heating the liquid
- C03B2207/87—Controlling the temperature
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0288—Multimode fibre, e.g. graded index core for compensating modal dispersion
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Glass Compositions (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Glass Melting And Manufacturing (AREA)
- Surface Treatment Of Glass (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Communication Cables (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Optical Integrated Circuits (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16565280 | 1980-07-03 | ||
| US06/165,652 US4298365A (en) | 1980-07-03 | 1980-07-03 | Method of making a soot preform compositional profile |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI812105L FI812105L (fi) | 1982-01-04 |
| FI68605B FI68605B (fi) | 1985-06-28 |
| FI68605C true FI68605C (fi) | 1985-10-10 |
Family
ID=22599850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI812105A FI68605C (fi) | 1980-07-03 | 1981-07-03 | Sotroerform foer optisk vaogledare optiska fibrer producerade daerav och metod foer framstaellning av sotroerformen |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US4298365A (enExample) |
| EP (1) | EP0043712B1 (enExample) |
| JP (1) | JPS5747740A (enExample) |
| KR (2) | KR830002159B1 (enExample) |
| AT (1) | ATE9576T1 (enExample) |
| AU (1) | AU540486B2 (enExample) |
| BR (1) | BR8103772A (enExample) |
| CA (1) | CA1177340A (enExample) |
| DE (1) | DE3166320D1 (enExample) |
| DK (1) | DK160708C (enExample) |
| ES (1) | ES503659A0 (enExample) |
| FI (1) | FI68605C (enExample) |
| IL (1) | IL63229A (enExample) |
| IN (1) | IN154436B (enExample) |
| NO (1) | NO152167C (enExample) |
| YU (1) | YU165981A (enExample) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453961A (en) * | 1982-07-26 | 1984-06-12 | Corning Glass Works | Method of making glass optical fiber |
| US4486212A (en) * | 1982-09-29 | 1984-12-04 | Corning Glass Works | Devitrification resistant flame hydrolysis process |
| JPS6046941A (ja) * | 1983-08-25 | 1985-03-14 | Sumitomo Electric Ind Ltd | 光フアイバ−用プリフオ−ムの製造方法 |
| JPS60260430A (ja) * | 1984-06-04 | 1985-12-23 | Sumitomo Electric Ind Ltd | フツ素をクラツド部に含有する光フアイバ用母材の製造方法 |
| US4915716A (en) * | 1986-10-02 | 1990-04-10 | American Telephone And Telegraph Company | Fabrication of lightguide soot preforms |
| JP2988524B2 (ja) * | 1988-09-19 | 1999-12-13 | 株式会社フジクラ | 光ファイバおよびその製造方法 |
| JPH03131544A (ja) * | 1989-06-29 | 1991-06-05 | Sumitomo Electric Ind Ltd | 光ファイバ用ガラス母材の加熱炉および製法 |
| US5059475A (en) * | 1990-06-29 | 1991-10-22 | Photonic Integration Research, Inc. | Apparatus and method of forming optical waveguides on metalized substrates |
| US5180410A (en) * | 1990-07-30 | 1993-01-19 | Corning Incorporated | Method of making polarization retaining fiber |
| US5241615A (en) * | 1992-06-18 | 1993-08-31 | Corning Incorporated | Optical waveguide fiber with very thin titania-silica outer cladding layer |
| US5822488A (en) * | 1995-10-04 | 1998-10-13 | Sumitomo Electric Industries, Inc. | Single-mode optical fiber with plural core portions |
| EP1044173A4 (en) * | 1997-12-23 | 2005-03-09 | Spectran Corp | LARGE SCALE MANUFACTURING PROCESS OF OPTICAL FIBER PREFORMS WITH IMPROVED CHARACTERISTICS |
| DE19850929C1 (de) * | 1998-11-05 | 1999-11-25 | Heraeus Quarzglas | Verfahren und Vorrichtung für die Herstellung eines Rohres aus Quarzglas |
| CN1341223A (zh) * | 1999-02-22 | 2002-03-20 | 康宁股份有限公司 | 供激光器和led光源和使用上述器件的系统之用的经激光优化的多模光纤及方法 |
| US6438303B1 (en) | 1999-02-22 | 2002-08-20 | Corning Incorporated | Laser optimized multimode fiber and method for use with laser and LED sources and system employing same |
| US6434309B1 (en) * | 1999-02-22 | 2002-08-13 | Corning Incorporated | Laser optimized multimode fiber and method for use with laser and LED sources and system employing same |
| BR0009970A (pt) * | 1999-04-26 | 2002-01-08 | Corning Inc | Fibra de guia de onda ótica de pico de água baixo e método de manufaturamento da mesma |
| DE10029151C1 (de) * | 2000-06-19 | 2001-08-16 | Heraeus Quarzglas | Verfahren für die Herstellung eines SiO¶2¶-Rohlings sowie SiO¶2¶-Rohling |
| US20110100064A1 (en) * | 2004-12-23 | 2011-05-05 | Nextrom Holling, S. A. | Method and apparatus for manufacturing an optical fiber core rod |
| US7412131B2 (en) * | 2007-01-02 | 2008-08-12 | General Electric Company | Multilayer optic device and system and method for making same |
| US20100154478A1 (en) | 2008-12-01 | 2010-06-24 | Panduit Corp. | Multimode fiber having improved index profile |
| US8351027B2 (en) * | 2009-06-15 | 2013-01-08 | Panduit Corp. | Method and metric for selecting and designing multimode fiber for improved performance |
| CN103472529B (zh) * | 2013-09-10 | 2015-06-10 | 烽火通信科技股份有限公司 | 低损耗光纤及其制造方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3823995A (en) * | 1972-03-30 | 1974-07-16 | Corning Glass Works | Method of forming light focusing fiber waveguide |
| CA967173A (en) * | 1973-01-04 | 1975-05-06 | Peter C. Schultz | Fused oxide type glasses |
| CA1106710A (en) * | 1977-06-22 | 1981-08-11 | Michael G. Blankenship | Method of making optical devices |
| US4204850A (en) * | 1977-08-26 | 1980-05-27 | Corning Glass Works | Carbon coating for a starting member used in producing optical waveguide |
| US4251251A (en) * | 1979-05-31 | 1981-02-17 | Corning Glass Works | Method of making optical devices |
-
1980
- 1980-07-03 US US06/165,652 patent/US4298365A/en not_active Expired - Lifetime
-
1981
- 1981-05-25 CA CA000378216A patent/CA1177340A/en not_active Expired
- 1981-06-15 BR BR8103772A patent/BR8103772A/pt not_active IP Right Cessation
- 1981-06-26 AU AU72198/81A patent/AU540486B2/en not_active Ceased
- 1981-07-03 YU YU01659/81A patent/YU165981A/xx unknown
- 1981-07-03 EP EP81303039A patent/EP0043712B1/en not_active Expired
- 1981-07-03 AT AT81303039T patent/ATE9576T1/de active
- 1981-07-03 KR KR1019810002419A patent/KR830002159B1/ko not_active Expired
- 1981-07-03 IN IN731/CAL/81A patent/IN154436B/en unknown
- 1981-07-03 IL IL63229A patent/IL63229A/xx not_active IP Right Cessation
- 1981-07-03 FI FI812105A patent/FI68605C/fi not_active IP Right Cessation
- 1981-07-03 DE DE8181303039T patent/DE3166320D1/de not_active Expired
- 1981-07-03 ES ES503659A patent/ES503659A0/es active Granted
- 1981-07-03 DK DK297181A patent/DK160708C/da not_active IP Right Cessation
- 1981-07-03 JP JP56104336A patent/JPS5747740A/ja active Granted
- 1981-07-03 NO NO812281A patent/NO152167C/no unknown
-
1982
- 1982-02-04 KR KR1019820000459A patent/KR830002157B1/ko not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES8301539A1 (es) | 1982-12-01 |
| IN154436B (enExample) | 1984-10-27 |
| KR830006127A (ko) | 1983-09-17 |
| AU540486B2 (en) | 1984-11-22 |
| NO152167B (no) | 1985-05-06 |
| DE3166320D1 (en) | 1984-10-31 |
| DK160708C (da) | 1991-09-16 |
| DK160708B (da) | 1991-04-08 |
| ES503659A0 (es) | 1982-12-01 |
| NO152167C (no) | 1985-08-28 |
| NO812281L (no) | 1982-01-04 |
| FI68605B (fi) | 1985-06-28 |
| JPS5747740A (en) | 1982-03-18 |
| BR8103772A (pt) | 1982-03-09 |
| KR830006124A (ko) | 1983-09-17 |
| EP0043712B1 (en) | 1984-09-26 |
| ATE9576T1 (de) | 1984-10-15 |
| KR830002157B1 (ko) | 1983-10-17 |
| IL63229A0 (en) | 1981-10-30 |
| EP0043712A1 (en) | 1982-01-13 |
| IL63229A (en) | 1987-02-27 |
| CA1177340A (en) | 1984-11-06 |
| AU7219881A (en) | 1982-01-07 |
| KR830002159B1 (ko) | 1983-10-17 |
| FI812105L (fi) | 1982-01-04 |
| DK297181A (da) | 1982-01-04 |
| YU165981A (en) | 1983-09-30 |
| JPH0239762B2 (enExample) | 1990-09-07 |
| US4298365A (en) | 1981-11-03 |
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