Patent US4123731A successfully refreshed from Google Patents.
US4123731A
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Glass for use in ultrasonic delay lines
Assignee: AGC Inc
•
Filing: 1977-08-24
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Granted: 1978-10-31
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Expires: 1997-08-24
Abstract
Abstract A glass suitable for use in ultrasonic delay lines which comprises the components by weight, SiO2 42 to 27%, PbO 71 to 52% and preferably contains K2O and/or Na2O. The glass further contains PbF2, BaF2, KHF2, K2SiF6, Na2SiF6, ZnO, CdO, BaO, SrO, ZrO2, TiO2, La2O3, Al2O3, B2O3, Sb2O3 and As2O3.
Inventors
- 👤 Tohru Kanbara
- 👤 Michihiko Uemura
- 👤 Nobuhiro Yokoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:26
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C4/00; C03C4/0057
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
113 words
In a solid ultrasonic delay line comprising an input transducer, a delay medium, and an output transducer, the improvement wherein said delay medium is a glass characterized by a rate of shear wave propagation not exceeding 2.40Km/sec., and which consists essentially of: ______________________________________
Weight percent
______________________________________
SiO.sub.2 42-27
PbO 71-52
PbF.sub.2 10-0
BaF.sub.2 10-0
KHF.sub.2 9-0
K.sub.2 SiF.sub.6 7-0
Na.sub.2 SiF.sub.6 5-0
K.sub.2 O 12-0
Na.sub.2 O 6-0
ZnO 6-0
CdO 6-0
BaO 10-0
SrO 6-0
ZrO.sub.2 5-0
TiO.sub.2 5-0
La.sub.2 O.sub.3 7-0
Al.sub.2 O.sub.3 5-0
B.sub.2 O.sub.3 9-0
Sb.sub.2 O.sub.3 +As.sub.2 O.sub.3
2-0
______________________________________ and wherein the composition of the glass includes 1-10 wt.% of K 2 O + Na 2 O.
Claim 2
Dependent Claim
113 words
In a solid ultrasonic delay line comprising an input transducer, a delay medium, and an output transducer, the improvement wherein said delay medium is a glass characterized by a rate of shear wave propagation not exceeding 2.40Km/sec., and which consists essentially of: ______________________________________
Weight percent
______________________________________
SiO.sub.2 42-27
PbO 71-52
PbF.sub.2 10-0
BaF.sub.2 10-0
KHF.sub.2 9-0
K.sub.2 SiF.sub.6 7-0
Na.sub.2 SiF.sub.6 5-0
K.sub.2 O 12-0
Na.sub.2 O 6-0
ZnO 6-0
CdO 6-0
BaO 10-0
SrO 6-0
ZrO.sub.2 5-0
TiO.sub.2 5-0
La.sub.2 O.sub.3 7-0
Al.sub.2 O.sub.3 5-0
B.sub.2 O.sub.3 9-0
Sb.sub.2 O.sub.3 +As.sub.2 O.sub.3
2-0
______________________________________ and wherein the composition of the glass includes 1-10 wt.% of K 2 O + Na 2 O.
Claim 3
Dependent Claim
138 words
In the solid ultrasonic delay line as claimed in claim 1, said glass having a rate of shear wave propagation not exceeding 2.30 Km/sec., and which consists essentially of: ______________________________________
weight percent
______________________________________
SiO.sub.2 37 - 27
PbO 71 - 57
PbF.sub.2 10 - 0
BaF.sub.2 10 - 0
KHF.sub.2 9 - 0
K.sub.2 SiF.sub.6 7 -
Na.sub.2 SiF.sub.6 5 - 0
K.sub.2 O 10 -0 0
Na.sub.2 O 5 - 0
ZnO 5 - 0
CdO 5 - 0
BaO 9 - 0
SrO 5 - 0
ZrO.sub.2 4 - 0
TiO.sub.2 4 - 0
La.sub.2 O.sub.3 6 - 0
Al.sub.2 O.sub.3 4 - 0
B.sub.2 O.sub.3 7 - 0
Sb.sub.2 O.sub.3 + As.sub.2 O.sub.3
1 - 0
______________________________________ and wherein the composition of the glass includes 1-10 wt.% of K 2 O + Na 2 O.
Claim 4
Dependent Claim
25 words
The solid ultrasonic delay line claimed in claim 1, wherein the composition of the glass includes, 30 - 36 wt. % of SiO 2 .
Claim 5
Dependent Claim
26 words
The solid ultrasonic delay line as claimed in claim 2, wherein the composition of the glass includes, 30 - 36 wt. % of SiO 2 .
Claim 6
Dependent Claim
24 words
The solid ultrasonic delay line as claimed in claim 1, wherein the composition of the glass includes 58 - 64 wt. % of PbO.
Claim 7
Dependent Claim
24 words
The solid ultrasonic delay line as claimed in claim 2, wherein the composition of the glass includes 58 - 64 wt. % of PbO.
Claim 8
Dependent Claim
52 words
The solid ultrasonic delay line as claimed in claim 1, wherein the composition of the glass includes, 1 - 10 wt. % of ZnO + CdO + BaO + SrO + ZrO 2 + TiO 2 + La 2 O 3 + Al 2 O 3 + B 2 O 3 .
Claim 9
Dependent Claim
52 words
The solid ultrasonic delay line as claimed in claim 2, wherein the composition of the glass includes, 1 - 10 wt. % of ZnO + CdO + BaO + SrO + ZrO 2 + TiO 2 + La 2 O 3 + Al 2 O 3 + B 2 O 3 .
Claim 10
Dependent Claim
42 words
The solid ultrasonic delay line as claimed in claim 1, wherein the composition of the glass includes 1 - 10 wt. % of PbF 2 + BaF 2 + KHF 2 + K 2 SiF 6 + Na 2 SiF 6 .
Claim 11
Dependent Claim
42 words
The solid ultrasonic delay line as claimed in claim 2, wherein the composition of the glass includes 1 - 10 wt. % of PbF 2 + BaF 2 + KHF 2 + K 2 SiF 6 + Na 2 SiF 6 .
Claim 12
Dependent Claim
79 words
The solid ultrasonic delay line as claimed in claim 1, wherein the composition of the glass includes, 1 - 20 wt. % of PbF 2 + BaF 2 + KHF 2 + K 2 SiF 6 + Na 2 SiF 6 + K 2 O + Na 2 O + ZnO + CdO + BaO + SrO + ZrO 2 + TiO 2 + La 2 O 3 + Al 2 O 3 + B 2 O 3 .
Claim 13
Dependent Claim
78 words
The solid ultrasonic delay line as claimed in claim 2, wherein the composition of the glass includes, 1- 20 wt. % of PbF 2 + BaF 2 + KHF 2 + K 2 SiF 6 + Na 2 SiF 6 + K 2 O + Na 2 O + ZnO + CdO + BaO + SrO + ZrO 2 + TiO 2 + La 2 O 3 + Al 2 O 3 + B 2 O 3 .
References Cited (Backward Citations)
US3198642A
Cited
US3238151A
Cited
US3303399A
Cited
US3421916A
Cited
US3598619A
Cited
US3672921A
Cited
US3687697A
Cited
US3857713A
Cited
US3973976A
Cited
US4029897A
Cited
US4018613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |