Patent US3966447A successfully refreshed from Google Patents.
US3966447A
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US
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Heat absorbing sealing method for laser glass
Assignee: Hoya Glass Works Ltd
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Filing: 1974-08-20
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Granted: 1976-06-29
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Expires: 1994-08-20
Abstract
Abstract A sealing method for a laser glass which provides a high bonding strength comprising applying a powder mixture of (1) a low melting glass containing an infrared absorbing component and (2) a low expansion high melting glass containing an infrared absorbing component to a laser glass and welding the powder mixture to the laser glass by heating.
Inventors
- 👤 Yoshiyuki Asahara
- 👤 Tetsuro Izumitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:03
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/24; C03C27/00; C03C4/00; C03C4/08; C03C4/082; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904; Y10S65/00; Y10S65/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A sealing method for a laser glass which comprises applying a powder mixture of (1) a low melting glass containing an infrared absorbing component and (2) a low expansion high melting glass containing an infrared absorbing component to an Nd laser glass and then welding the powder mixture to the laser glass by heating.
Claim 2
Dependent Claim
54 words
A sealing method for a laser glass which comprises applying a powder mixture of (1) a low melting glass containing an infrared absorbing component and (2) a low expansion high melting glass containing an infrared absorbing component to an Nd laser glass and then welding the powder mixture to the laser glass by heating.
Claim 3
Dependent Claim
27 words
The sealing method of claim 1, wherein the proportion by weight of the low melting glass to the high melting glass ranges from about 98:2 to 50:50.
Claim 4
Dependent Claim
29 words
The sealing method of claim 1, wherein the welding of the glass mixture to the laser glass is by heating to a temperature of from about 400° to 600°C.
Claim 5
Dependent Claim
21 words
The sealing method of claim 1, wherein the particles of the powder mixture have a size of not above 100 μ.
Claim 6
Dependent Claim
26 words
The sealing method of claim 1, wherein said infrared absorbing component is at least one of V 2 O 5 and Fe 2 O 3 .
Claim 7
Dependent Claim
26 words
The sealing method of claim 1, wherein said infrared absorbing component is present in said glass in an amount of from about 5 to 18 mol%.
Claim 8
Dependent Claim
61 words
The sealing method of claim 1, wherein upon welding by heating the powder of the low expansion high melting glass is dispersed in the low melting glass which is fused at the welding temperature, whereby the expansion coefficient of the resulting sealing glass mixture is reduced to a value no greater than substantially the same as that of the laser glass.
Claim 9
Dependent Claim
27 words
The sealing method of claim 7, wherein the expansion coefficient of the sealing glass mixture is reduced to a value lower than that of the laser glass.
References Cited (Backward Citations)
US2248644A
Cited
US3120433A
Cited
US3254031A
Cited
US3420683A
Cited
US3778242A
Cited
US3912482A
Cited
US3881904A
Cited
US3814612A
Cited
US3885974A
Cited
US3907535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |