Patent US4437727A successfully refreshed from Google Patents.
US4437727A
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Quartz glass envelope tube
Assignee: Heraeus Quarzschmelze GmbH
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Filing: 1982-06-03
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Granted: 1984-03-20
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Expires: 2002-06-03
Abstract
Abstract A quartz glass envelope tube for the preparation of a light guide fiber blank, the tube being in the form of a laminate in which the inner layer consists essentially of quartz glass made from rock crystal and the outer layer of synthetic quartz glass. Good mechanical properties, especially tensile strength, are thereby achieved.
Inventors
- 👤 Norbert Treber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01413; C03B37/0142; C03B37/01426; C03B2201/00; C03B2201/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
75 words
Quartz glass envelope tube for the production of a light guide fiber blank, in the form of a laminate, the internal layer consisting essentially of fused rock crystal or quartz sand and the external layer of synthetic quartz glass, the total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total tube wall thickness.
Claim 2
Dependent Claim
75 words
Quartz glass envelope tube for the production of a light guide fiber blank, in the form of a laminate, the internal layer consisting essentially of fused rock crystal or quartz sand and the external layer of synthetic quartz glass, the total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total tube wall thickness.
Claim 3
Dependent Claim
21 words
Quartz glass envelope tube of claim 1, wherein the outer layer consists essentially of a vapor phase deposit synthetic quartz glass.
Claim 4
Dependent Claim
23 words
Quartz glass envelope tube of claim 2, wherein said synthetic quartz glass is produced from reaction of a silicon halide by flame hydrolysis.
Claim 5
Dependent Claim
26 words
Quartz glass envelope tube of claim 2, wherein said synthetic quartz glass is produced from a silicon halide by means of an inductively coupled plasma burner.
Claim 6
Dependent Claim
112 words
A rod for the formation a light guide fiber consisting essentially of: (a) an internal quartz glass rod itself consisting essentially of (1) a core (2) a sheath disposed about said core; and (b) a quartz glass envelope tube disposed about said internal quartz glass rod itself consisting essentially of (1) an internal layer consisting essentially of fused rock crystal or quartz sand; (2) an external layer consisting essentially of synthetic quartz glass, a total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
Claim 7
Dependent Claim
112 words
A rod for the formation a light guide fiber consisting essentially of: (a) an internal quartz glass rod itself consisting essentially of (1) a core (2) a sheath disposed about said core; and (b) a quartz glass envelope tube disposed about said internal quartz glass rod itself consisting essentially of (1) an internal layer consisting essentially of fused rock crystal or quartz sand; (2) an external layer consisting essentially of synthetic quartz glass, a total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
Claim 8
Dependent Claim
26 words
A rod according to claim 2, wherein the outer layer of said quartz glass envelope tube consists essentially of a vapor phase deposited synthetic quartz glass.
Claim 9
Dependent Claim
22 words
A rod according to claim 6, wherein said synthetic quartz glass is produced from reaction of a silicon halide by flame hydrolysis.
Claim 10
Dependent Claim
25 words
A rod according to claim 6, wherein said synthetic quartz glass is produced from a silicon halide by means of an inductively coupled plasma burner.
Claim 11
Dependent Claim
84 words
A hollow quartz glass envelope tube consisting essentially of a hollow space about which is disposed said tube, said tube consisting essentially of: (1) an internal layer consisting essentially of fused rock crystal or quartz sands; (2) an external layer consisting essentially of synthetic quartz glass, the total wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
Claim 12
Dependent Claim
84 words
A hollow quartz glass envelope tube consisting essentially of a hollow space about which is disposed said tube, said tube consisting essentially of: (1) an internal layer consisting essentially of fused rock crystal or quartz sands; (2) an external layer consisting essentially of synthetic quartz glass, the total wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
Claim 13
Dependent Claim
21 words
A hollow tube according to claim 9, wherein said outer layer consists essentially of a vapor phased deposited synthetic quartz glass.
Claim 14
Dependent Claim
23 words
A hollow tube according to claim 10, wherein said synthetic quartz glass is produced from reaction of a silicon halide by flame hydrolysis.
Claim 15
Dependent Claim
26 words
A hollow tube according to claim 10, wherein said synthetic quartz glass is produced from a silicon halide by means of an inductively coupled plasma burner.
Claim 16
Dependent Claim
88 words
A rod for the formation of a light guide fiber comprising an envelope tube internally coated with quartz glass, said envelope tube consisting essentially of: (a) an internal layer consisting essentially of fused rock crystal or quartz sand, and (b) an external layer consisting essentially of synthetic quartz glass, a total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
Claim 17
Dependent Claim
88 words
A rod for the formation of a light guide fiber comprising an envelope tube internally coated with quartz glass, said envelope tube consisting essentially of: (a) an internal layer consisting essentially of fused rock crystal or quartz sand, and (b) an external layer consisting essentially of synthetic quartz glass, a total tube wall thickness of said tube being not greater than 10 mm, the external layer being at least 0.2 mm thick and amounting to approximately 2 to 50% of the total wall thickness of said envelope tube.
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |