US4229220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge-coating glass for laser disks
Assignee: Hoya Corp
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Filing: 1979-08-30
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Granted: 1980-10-21
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Expires: 1999-08-30
Abstract
Abstract A glass for coating a laser glass and which has a high absorption for laser light which comprises, in mol %, 51 to 59% P 2 O 5 ; 0 to 8% B 2 O 3 ; 4 to 10% Al 2 O 3 ; 0 to 20% Li 2 O; 0 to 17% Na 2 O; 8 to 20% Li 2 0+Na 2 O; 0 to 23% ZnO; 0 to 15% BaO; 7 to 28% CuO; and 0 to 13% V 2 O 5 .
Inventors
- 👤 Shinichiro Hirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:15
CPC Classifications
C; C03; C03C; C03C4/00; C03C4/0071; C03C17/00; C03C17/02; C03C3/00; C03C3/12; C03C3/16; C03C3/17; C03C3/19; C03C3/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A glass for coating a laser glass, having a high absorption for laser light consisting essentially of, in mol %, 51 to 59 % P 2 O 5 ; 0 to 8% B 2 O 3 ; 4 to 10% Al 2 O 3 ; 0 to 19% Li 2 O; 0 to 16.5% Na 2 O; 8.5 to 19% Li 2 O+Na 2 O; 0 to 23% ZnO; 0 to 14.5% BaO; 7.5 to 28% CuO; and 0 to 12.5% V 2 O 5 .
Claim 2
Dependent Claim
86 words
A glass for coating a laser glass, having a high absorption for laser light consisting essentially of, in mol %, 51 to 59 % P 2 O 5 ; 0 to 8% B 2 O 3 ; 4 to 10% Al 2 O 3 ; 0 to 19% Li 2 O; 0 to 16.5% Na 2 O; 8.5 to 19% Li 2 O+Na 2 O; 0 to 23% ZnO; 0 to 14.5% BaO; 7.5 to 28% CuO; and 0 to 12.5% V 2 O 5 .
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |