US3722981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low melting point optical transmission line
Assignee: AT&T Inc
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Filing: 1971-05-17
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Granted: 1973-03-27
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Expires: 1991-05-17
Abstract
Abstract Use of material selected from classes of low-melting watersoluble glasses is found to result in low Rayleigh scattering loss. Decreased insertion loss due to this mechanism becomes significant when losses due to other mechanisms have been minimized. Reduction of ultimate insertion loss relative to the more usual insoluble high-melting glasses may justify the additional expense incurred in designing protective systems.
Inventors
- 👤 D Pinnow
- 👤 Grand Van Uitert G Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:03
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/047; C03C3/00; C03C3/12; C03C3/23; C03C3/32; C03C3/325; C03C3/326; G; G02; G02B; G02B6/00; G02B6/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
60 words
Transmission line for electromagnetic radiation comprising a glassy member and first and second means for introducing and extracting radiation, respectively, characterized in that said glassy member is a water soluble composition having a melting point of below about 600* C, and in that said line is provided with third means which acts as a substantial barrier to ambient atmospheric ingredients.
Claim 2
Dependent Claim
60 words
Transmission line for electromagnetic radiation comprising a glassy member and first and second means for introducing and extracting radiation, respectively, characterized in that said glassy member is a water soluble composition having a melting point of below about 600* C, and in that said line is provided with third means which acts as a substantial barrier to ambient atmospheric ingredients.
Claim 3
Dependent Claim
27 words
Transmission line of claim 1 in which said glassy member consists essentially of at least one compound selected from the group consisting of nitrates, acetates, and BeF2.
Claim 4
Dependent Claim
20 words
Transmission line of claim 2 in which the said glassy member consists essentially of a mixture of KNO3 and Ca(NO3)2.
Claim 5
Dependent Claim
15 words
Transmission line of claim 2 in which the said glassy member consists essentially of Y(NO3)3.
Claim 6
Dependent Claim
18 words
Transmission line of claim 2 in which the said glassy member consists essentially of a mixture of MgNO3-Y(NO3)3.
Claim 7
Dependent Claim
18 words
Transmission line of claim 2 in which the said glassy member consists essentially of a mixture of LiNO3-Y(NO3)3.
Claim 8
Dependent Claim
30 words
Transmission line of claim 2 in which the said glassy member consists essentially of at least one acetate of a cation selected from the group consisting of lithium and sodium.
Claim 9
Dependent Claim
44 words
Transmission line of claim 7 in which said composition is modified by cation substitution in amount of at least 1 weight percent of at least one element selected from the group consisting of Ca, Sr, Ba, Pb, Zn, Cd, Gd, Y, La and Lu.
Claim 10
Dependent Claim
27 words
Transmission line of claim 8 in which said Composition contains both lithium and sodium as cations, each being present in amount of at least 10 cation percent.
Claim 11
Dependent Claim
13 words
Transmission line of claim 9 in which said composition additionally contains cationic yttrium.
Claim 12
Dependent Claim
21 words
Transmission line of claim 1 in which said composition is modified by replacement of substantially all OH groupings by OD groupings.
Claim 13
Dependent Claim
14 words
Transmission line of claim 1 in which said glassy member consists essentially of B2O3.
Claim 14
Dependent Claim
17 words
Transmission line of claim 1 in which said first means includes at least one optically polished surface.
Claim 15
Dependent Claim
17 words
Transmission line of claim 1 in which said second means includes at least one optically polished surface.
Claim 16
Dependent Claim
15 words
Transmission line of claim 1 in which said first means includes an index matching material.
Claim 17
Dependent Claim
14 words
Transmission line of claim 1 in which said first means includes a laser oscillator.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |