Patent US4451116A successfully refreshed from Google Patents.
US4451116A
Expired / Lapsed
US
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Infrared transmitting fiber optical waveguide extruded from halides of the metal thallium and the method of preparation
Assignee: The AT&T MVPD Group LLC
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Filing: 1981-02-02
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Granted: 1984-05-29
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Expires: 2001-02-02
Abstract
Abstract There is disclosed a fiber optic waveguide which is particularly suited for infrared radiation transmission at extended wavelengths. The core of the waveguide is fabricated from heavy ionic compounds selected from metal halides in order to achieve such extended infrared transparency. While it is impossible to prepare these materials into optical fibers using conventional fiber drawing techniques, the present invention teaches how such materials may be prepared into optical fibers using an extrusion process at elevated temperatures and high pressures.
Inventors
- 👤 Douglas A. Pinnow
- 👤 Anthony L. Gentile
- 👤 Arlie G. Standlee
- 👤 Arthur J. Timper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:36
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/441; G02B6/4414; C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/023; C03C; C03C13/00; C03C13/008; G02B6/10; G02B6/102; G02B6/4402; C03B2201/00; C03B2201/80; C03B2201/82; C03B2201/84; C03B2205/00; C03B2205/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
The method of making an optical fiber from thallium bromoiodide, comprising the steps of: heating a quantity of thallium bromoiodide to a temperature which is in the range of 200° C. to 350° C.; and extruding an optical fiber from said heated material.
Claim 2
Independent Claim
43 words
The method of making an optical fiber from thallium bromoiodide, comprising the steps of: heating a quantity of thallium bromoiodide to a temperature which is in the range of 200° C. to 350° C.; and extruding an optical fiber from said heated material.
Claim 3
Independent Claim
51 words
The method of making an optical fiber from thallium bromoiodide, comprising the steps of: heating a quantity of thallium bromoiodide to a temperature which is in the range of 200° C. to 350° C.; and extruding an optical fiber from said heated material at a rate of several centimeters per minute.
Claim 4
Independent Claim
51 words
The method of making an optical fiber from thallium bromoiodide, comprising the steps of: heating a quantity of thallium bromoiodide to a temperature which is in the range of 200° C. to 350° C.; and extruding an optical fiber from said heated material at a rate of several centimeters per minute.
Claim 5
Dependent Claim
29 words
As a new article of manufacture, an optical fiber of thallium bromoiodide which is extruded in the presence of heat in the range of 200° C. to 350° C.
Claim 6
Dependent Claim
29 words
As a new article of manufacture, an optical fiber of thallium bromoiodide which is extruded in the presence of heat in the range of 200° C. to 350° C.
Claim 7
Dependent Claim
37 words
As a new article of manufacture, an optical fiber of thallium bromoiodide which is extruded in the presence of heat in the range of 200° C. to 350° C. at a rate of several centimeters per minute.
Claim 8
Dependent Claim
37 words
As a new article of manufacture, an optical fiber of thallium bromoiodide which is extruded in the presence of heat in the range of 200° C. to 350° C. at a rate of several centimeters per minute.
References Cited (Backward Citations)
US1579019A
Cited
US1536821A
Cited
US2986527A
Cited
US3551051A
Cited
US3674330A
Cited
US3843865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |