US4735856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetic coatings for optical fiber and product
Assignee: APPLIED PHOTONIC DEVICES Inc
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Filing: 1986-03-31
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Granted: 1988-04-05
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Expires: 2006-03-31
Abstract
Abstract A method for hermetically sealing a silica based fiber product after the fiber product has been drawn from a melt or preform wherein a hermetic layer of boron carbide or a ceramic compound having a density of above about 4 g/cc is deposited upon the fiber product. The fiber product can be initially coated with carbon or boron carbide prior to the application of the ceramic compound. Also, a method for making such fiber products using these methods, and the resultant hermetically sealed fiber products produced thereby.
Inventors
- 👤 Peter C. Schultz
- 👤 Satyabrata Raychaudhuri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/22; C03C25/223; C03C25/104; C03C25/106; C03C25/1061; C03C25/1062; C23; C23C; C23C16/00; C23C16/22; C23C16/26; C23C16/30; C23C16/32; C23C16/34; C23C16/38; C23C16/40; C23C16/405; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/292; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2949; Y10T428/2958
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
43 words
A method for hermetically sealing optical fiber products which comprises coating said optical fiber products with a hermetic coating of at least one ceramic compound of a transition metal carbide, nitride or boride, said compound having a density of above about 4 g/cc.
Claim 2
Independent Claim
43 words
A method for hermetically sealing optical fiber products which comprises coating said optical fiber products with a hermetic coating of at least one ceramic compound of a transition metal carbide, nitride or boride, said compound having a density of above about 4 g/cc.
Claim 3
Dependent Claim
29 words
The method of claim 1 wherein the ceramic compound is tungsten carbide, tungsten nitride, tungsten boride, titanium carbide, titanium nitride, titanium boride, chromium carbide, chromium nitride, or chromium boride.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said fiber products are coated with said ceramic compound by chemical vapor deposition.
Claim 5
Dependent Claim
32 words
The method of claim 1 which further comprises initially coating said fiber products with a layer of carbon or boron carbide prior to applying the layer of at least one ceramic compound.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein two or more of said ceramic compounds are codeposited as mixtures upon said fiber products.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein two or more layers of different ceramic compounds are deposited upon said fiber products.
Claim 8
Independent Claim
67 words
A method for making a hermetically sealed optical fiber product which comprises: drawing an optical fiber product from a melt or preform; and coating said optical fiber product with a hermetic layer of at least one ceramic compound of a transition metal carbide, nitride, boride, or mixture thereof, said compound having a density of above about 4 g/cc as to form a hermetically sealed optical fiber product.
Claim 9
Independent Claim
67 words
A method for making a hermetically sealed optical fiber product which comprises: drawing an optical fiber product from a melt or preform; and coating said optical fiber product with a hermetic layer of at least one ceramic compound of a transition metal carbide, nitride, boride, or mixture thereof, said compound having a density of above about 4 g/cc as to form a hermetically sealed optical fiber product.
Claim 10
Dependent Claim
29 words
The method of claim 7 wherein the ceramic compound is tungsten carbide, tungsten nitride, tungsten boride, titanium carbide, titanium nitride, titanium boride, chromium carbide, chromium nitride, or chromium boride.
Claim 11
Dependent Claim
32 words
The method of claim 7 which further comprises initially coating said fiber product with a layer of carbon or boron carbide prior to applying the layer of at least one ceramic compound.
Claim 12
Dependent Claim
19 words
The method of claim 7 wherein two or more of said ceramic compounds are codeposited upon said fiber products.
Claim 13
Dependent Claim
24 words
The method of claim 7 wherein two or more layers of different ceramic compounds are deposited upon the initial carbon or boron carbide layer.
Claim 14
Independent Claim
38 words
A method for hermetically sealing optical based fiber products which comprises: initially coating said optical fiber products with a layer of carbon or boron carbide; and further coating said carbon coated fibers with at least one ceramic compound.
Claim 15
Independent Claim
38 words
A method for hermetically sealing optical based fiber products which comprises: initially coating said optical fiber products with a layer of carbon or boron carbide; and further coating said carbon coated fibers with at least one ceramic compound.
Claim 16
Dependent Claim
18 words
The method of claim 12 wherein said ceramic compound is a carbide, nitride, boride, oxide, or mixtures thereof.
Claim 17
Independent Claim
54 words
A method for making a hermetically sealed silica based optical fiber product which comprises: drawing a silica based optical fiber product from a melt or preform; initially coating said optical fiber product with a layer of carbon or boron carbide; and further coating said carbon coated fiber product with at least one ceramic compound.
Claim 18
Independent Claim
54 words
A method for making a hermetically sealed silica based optical fiber product which comprises: drawing a silica based optical fiber product from a melt or preform; initially coating said optical fiber product with a layer of carbon or boron carbide; and further coating said carbon coated fiber product with at least one ceramic compound.
Claim 19
Dependent Claim
18 words
The method of claim 14 wherein said ceramic compound is a carbide, nitride, boride, oxide, or mixtures thereof.
Claim 20
Independent Claim
23 words
A method for hermetically sealing silica based optical fiber products which comprises coating said fiber products with a hermetic layer of boron carbide.
Claim 21
Independent Claim
23 words
A method for hermetically sealing silica based optical fiber products which comprises coating said fiber products with a hermetic layer of boron carbide.
Claim 22
Dependent Claim
26 words
The method of claim 16 which further comprises initially coating said fiber product with a layer of carbon prior to depositing the layer of boron carbide.
Claim 23
Dependent Claim
11 words
The sealed fiber product produced by the method of claim 12.
Claim 24
Dependent Claim
11 words
The sealed fiber product produced by the method of claim 17.
Claim 25
Dependent Claim
32 words
An optical fiber product having an encapsulating hermetic coating comprising at least one ceramic compound of a transitional metal carbide, nitride or boride, said compound having a density above about 4 g/cc.
Claim 26
Dependent Claim
32 words
An optical fiber product having an encapsulating hermetic coating comprising at least one ceramic compound of a transitional metal carbide, nitride or boride, said compound having a density above about 4 g/cc.
Claim 27
Dependent Claim
29 words
An optical fiber product of claim 20 wherein the ceramic compound is tungsten carbide, tungsten nitride, tungsten boride, titanium carbide, titanium nitride, titanium boride, chromium nitride, or chromium boride.
Claim 28
Dependent Claim
24 words
The optical fiber product of claim 20 wherein the coating comprises two or more of said ceramic compounds which are codeposited as a mixture.
Claim 29
Dependent Claim
19 words
The optical fiber product of claim 20 wherein said coating comprises two or more layers of different ceramic compounds.
Claim 30
Dependent Claim
15 words
An optical fiber product having an encapsulating hermetic coating comprising a layer of boron carbide.
Claim 31
Dependent Claim
15 words
An optical fiber product having an encapsulating hermetic coating comprising a layer of boron carbide.
Claim 32
Dependent Claim
32 words
An optical fiber product having an encapsulating hermetic coating comprising a first layer of carbon or boron carbide and a second layer of at least one ceramic compound upon said first layer.
Claim 33
Dependent Claim
32 words
An optical fiber product having an encapsulating hermetic coating comprising a first layer of carbon or boron carbide and a second layer of at least one ceramic compound upon said first layer.
Claim 34
Dependent Claim
24 words
The optical fiber product of claim 25 wherein the ceramic compound of the second layer is a carbide, nitride, boride, oxide, or mixtures thereof.
Claim 35
Dependent Claim
17 words
An optical fiber product having an encapsulating hermetic coating comprising tungsten oxide, chromium oxide, or mixtures thereof.
Claim 36
Dependent Claim
17 words
An optical fiber product having an encapsulating hermetic coating comprising tungsten oxide, chromium oxide, or mixtures thereof.
Claim 37
Dependent Claim
19 words
The product of claim 27 further comprising a layer of carbon between said optical fiber and said hermetic coating.
Claim 38
Dependent Claim
53 words
An optical fiber product having an encapsulating hermetic coating comprising a first layer of boron carbide deposited upon said fiber and a second layer of tungsten carbide, tungsten boride, tungsten oxide, titanium carbide, titanium nitride, titanium boride, chromium oxide, chromium nitride, chromium boride, or mixtures there of deposited upon said boron carbide layer.
Claim 39
Dependent Claim
53 words
An optical fiber product having an encapsulating hermetic coating comprising a first layer of boron carbide deposited upon said fiber and a second layer of tungsten carbide, tungsten boride, tungsten oxide, titanium carbide, titanium nitride, titanium boride, chromium oxide, chromium nitride, chromium boride, or mixtures there of deposited upon said boron carbide layer.
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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) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |