US4688889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen fixing fillers for optical fiber cables and components and cables and components containing such filler
Assignee: Pirelli and C SpA
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Filing: 1985-11-15
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Granted: 1987-08-25
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Expires: 2005-11-15
Abstract
Abstract A hydrogen fixing filler for optical fiber cables and components of such cables and optical fiber cables and cable components containing such filler with the filler at least partly surrounding, but not necessarily in contact with, the optical fiber or fibers. The filler is a mixture of: (1) at least one unsaturated silicone, having unsaturated groups in quantities larger than 0.2 millimoles per 100 g. of silicone and corresponding to the formula: ##STR1## where R and R' are saturated or unsaturated aliphatic radicals and aromatic radicals and R" and R'" are unsaturated aliphatic radicals, and (2) a catalyst which is one or more of the transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of the transition metals, either alone or on inert supports.
Inventors
- 👤 Franco Pasini
- 👤 Pietro Anelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:08
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/44382; H01B7/00; H01B7/17; H01B7/28
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
105 words
A hydrogen fixing filler for optical fiber cables and their components comprising a mixture of: (a) at least one unsaturated silicone having unsaturated groups in quantities larger than 0.2 millimoles per 100 g. of said silicon and having the formula: ##STR8## where R and R' are from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals and n is an integral number; and (b) at least one transition metal catalyst selected from group consisting of transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of said transition metals.
Claim 2
Dependent Claim
105 words
A hydrogen fixing filler for optical fiber cables and their components comprising a mixture of: (a) at least one unsaturated silicone having unsaturated groups in quantities larger than 0.2 millimoles per 100 g. of said silicon and having the formula: ##STR8## where R and R' are from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals and n is an integral number; and (b) at least one transition metal catalyst selected from group consisting of transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of said transition metals.
Claim 3
Dependent Claim
22 words
A hydrogen fixing filler as set forth in claim 1, wherein said transition metal catalyst is supported on an inert carrier material.
Claim 4
Dependent Claim
16 words
A hydrogen fixing filler as set forth in claim 2, wherein said carrier material is charcoal.
Claim 5
Dependent Claim
51 words
A hydrogen fixing filler as set forth in claim 1, wherein said unsaturated silicone has unsaturated groups in quantities in the range from about 2 to about 100 millimoles per 100 g. of the silicone and wherein n is an integral number in the range from about 100 to about 2000.
Claim 6
Dependent Claim
43 words
A hydrogen fixing filler as set forth in claim 1, wherein R and R' are radicals selected from the group consisting of: --CH.sub.3, --C.sub.2 H.sub.5, --CH═CH.sub.2, --C.sub.6 H.sub.5 and R" and R'" are radicals selected from the group consisting of: --CH═CH.sub.2, --CH.sub.2 --CH═CH.sub.2.
Claim 7
Dependent Claim
22 words
A hydrogen fixing filler as set forth in claim 5, wherein the unsaturated silicon is a vinyl-terminated poly-dimethylsiloxane having the formula: ##STR9##
Claim 8
Dependent Claim
42 words
A hydrogen fixing filler as set forth in claim 5, wherein the unsaturated silicone is a polydimethylsiloxane terminated with vinyl unsaturations in the chain having the formula: ##STR10## where a and b are integral numbers and their sum is equal to n.
Claim 9
Dependent Claim
33 words
A hydrogen fixing filler as set forth in claim 1, wherein the transition metal catalyst is selected from the group consisting of powdered palladium, powdered platinum, powdered nickel, iron pentacarbonyl and chloroplatinic acid.
Claim 10
Dependent Claim
22 words
A hydrogen fixing filler as set forth in claim 8, wherein said transition metal catalyst is supported on an inert carrier material.
Claim 11
Dependent Claim
100 words
An optical fiber at least partly surrounded by a mixture comprising: (a) an unsaturated silicone having unsaturated groups in a quantity larger than 0.2 millimoles per 100 g. of silicone and having the formula: ##STR11## where R and R' are selected from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals; and n is an integral number; and (b) a transition metal catalyst selected from the group consisting of the transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of the transition metals.
Claim 12
Dependent Claim
100 words
An optical fiber at least partly surrounded by a mixture comprising: (a) an unsaturated silicone having unsaturated groups in a quantity larger than 0.2 millimoles per 100 g. of silicone and having the formula: ##STR11## where R and R' are selected from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals; and n is an integral number; and (b) a transition metal catalyst selected from the group consisting of the transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of the transition metals.
Claim 13
Dependent Claim
28 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 10, wherein said transition metal catalyst is supported on an inert carrier material.
Claim 14
Dependent Claim
31 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 10, further comprising a member having a passageway therein, said fiber being disposed in said passageway.
Claim 15
Dependent Claim
55 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 12, wherein said member is a tube providing said passageway and said fiber is loosely disposed in said passageway and wherein said mixture is in said passageway between said optical fiber and the interior of the wall of said tube.
Claim 16
Dependent Claim
38 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 12, wherein said member is an optical fiber cable core with said passageway therein and wherein said core is surrounded by a sheath.
Claim 17
Dependent Claim
27 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 14, wherein said mixture is intermediate said sheath and said optical fiber.
Claim 18
Dependent Claim
57 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 10, wherein said unsaturated silicone has unsaturated groups in quantities in the range from about 2 to about 100 millimoles per 100 g. of the silicone and wherein n is an integral number in the range from about 100 to about 2000.
Claim 19
Dependent Claim
49 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 10, wherein R and R' are radicals selected from the group consisting of: --CH.sub.3, --CH.sub.2 H.sub.5, --CH═CH.sub.2, --C.sub.6 H.sub.5 and R" and R'" are radicals selected from the group consisting of: --CH═CH.sub.2, --CH.sub.2 --CH═CH.sub.2.
Claim 20
Dependent Claim
28 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 17, wherein the unsaturated silicone is a vinyl-terminated polydimethylsiloxane having the formula: ##STR12##
Claim 21
Dependent Claim
34 words
An optical fiber at least partly surrounded by a mixture as set forth in claim 17, wherein the unsaturated silicone is a polydimethylsiloxane terminated with vinyl unsaturations in the chain having the formula: ##STR13##
Claim 22
Dependent Claim
115 words
An optical fiber cable comprising at least one optical fiber within a protective layer and at least partly surrounding said optical fiber, a mixture of: (a) at least one unsaturated silicone having unsaturated groups in quantities larger than 0.2 millimoles per 100 g. of said silicone and having the formula: ##STR14## where R and R' are from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals and n is an integral number; and (b) at least one transition metal catalyst selected from group consisting of transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of said transition metals.
Claim 23
Dependent Claim
115 words
An optical fiber cable comprising at least one optical fiber within a protective layer and at least partly surrounding said optical fiber, a mixture of: (a) at least one unsaturated silicone having unsaturated groups in quantities larger than 0.2 millimoles per 100 g. of said silicone and having the formula: ##STR14## where R and R' are from the group consisting of saturated aliphatic radicals, unsaturated aliphatic radicals and aromatic radicals, R" and R'" are unsaturated aliphatic radicals and n is an integral number; and (b) at least one transition metal catalyst selected from group consisting of transition metals, the inorganic and organometallic salts of the transition metals and the organometallic acids of said transition metals.
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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) | 1990-08-24 | 1991-02-23 | 1991-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-24 | 1995-02-23 | 1995-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-24 | 1999-02-23 | 1999-08-25 | $7700.00 | Window Closed / Lapsed |