Patent US4253731A successfully refreshed from Google Patents.
US4253731A
Expired / Lapsed
US
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Infrared fiber of AgCl clad AgBr and method of fabrication
Assignee: Honeywell Inc
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Filing: 1979-04-09
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Granted: 1981-03-03
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Expires: 1999-04-09
Abstract
Abstract An infrared fiber of a silver chloride clad silver bromide core fabricated by an extrusion process in which both core and cladding are extruded.
Inventors
- 👤 Rogers H. Anderson
- 👤 Enrique B. G.
- 👤 Di Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:21
CPC Classifications
C; C30; C30B; C30B33/00; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/023; C03C; C03C13/00; C03C13/008; C30B29/00; C30B29/10; C30B29/12; C30B29/60; C30B29/62; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; C03B2201/00; C03B2201/80; C03B2201/84; C03B2205/00; C03B2205/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
The method of producing a AgCl clad AgBr optic fiber comprising the steps of: providing a coaxial two-part preform billet having an axial core of crystalline AgBr and a sleeve of crystalline AgCl surrounding said core; orienting said two-part billet in an extruding press to axially align said core and sleeve with the direction of extrusion; bringing said preform billet to a desired temperature; and, applying force to said extruding press at a pressure to extrude therefrom a coaxial fine-grain optic fiber of AgCl clad AgBr.
Claim 2
Independent Claim
86 words
The method of producing a AgCl clad AgBr optic fiber comprising the steps of: providing a coaxial two-part preform billet having an axial core of crystalline AgBr and a sleeve of crystalline AgCl surrounding said core; orienting said two-part billet in an extruding press to axially align said core and sleeve with the direction of extrusion; bringing said preform billet to a desired temperature; and, applying force to said extruding press at a pressure to extrude therefrom a coaxial fine-grain optic fiber of AgCl clad AgBr.
Claim 3
Dependent Claim
23 words
The method according to claim 1 wherein the billet is brought to the temperature range of about 20° C. to about 300° C.
Claim 4
Dependent Claim
18 words
The method according to claim 2 wherein the billet is brought to a temperature of about 20° C.
Claim 5
Dependent Claim
18 words
The method according to claim 1 wherein the crystalline AgBr core of the billet is single crystal AgBr.
Claim 6
Dependent Claim
17 words
The method according to claim 1 wherein the crystalline AgBr core of the billet is polycrystal AgBr.
Claim 7
Dependent Claim
20 words
The method according to claim 4 or 5 wherein the crystalline AgCl sleeve of the billet is single crystal AgCl.
Claim 8
Dependent Claim
19 words
The method according to claim 4 or 5 wherein the crystalline AgCl sleeve of the billet is polycrystal AgCl.
Claim 9
Dependent Claim
22 words
The method according to claim 1 wherein the pressure is in the range of from about 260,000 psi to about 280,000 psi.
Claim 10
Dependent Claim
25 words
The method according to claim 1 wherein the extruding is at a rate in the range of from about 0.2 inches/minute to about 25 inches/minute.
Claim 11
Dependent Claim
23 words
An infrared transmissive optic fiber comprising: a silver bromide fiber core having a fine-grained crystalline structure clad with a fine-grained silver chloride cladding.
Claim 12
Dependent Claim
23 words
An infrared transmissive optic fiber comprising: a silver bromide fiber core having a fine-grained crystalline structure clad with a fine-grained silver chloride cladding.
Claim 13
Dependent Claim
26 words
The fiber according to claim 10 wherein the refractive index of the silver bromide is 2.0 and the refractive index of the silver chloride is 1.98.
Claim 14
Dependent Claim
21 words
The fiber according to claim 10 wherein the grain size of the core and cladding is less than about 3 μm.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |