US4110245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Green colored filter glass
Assignee: Hoya Corp
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Filing: 1977-12-02
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Granted: 1978-08-29
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Expires: 1997-12-02
Abstract
Abstract A green colored filter glass comprising (a) 100 parts by weight of a base glass consisting of, by weight, 40 to 85% P 2 O 5 , 2 to 10% Al 2 O 3 , 0 to 53% BaO, 0 to 15% Li 2 O, 3 to 53% BaO+ Li 2 O, 0 to 15% NaO and/or K 2 O, 0 to 10% MgO, CaO, ZnO and/or PbO, 0 to 20% SrO and 0 to 5% B 2 O 3 , ZrO 2 , TiO 2 and/or La 2 O 3 ; (b) 0.01 to 3.0 parts by weight of NiO; and (c) 0.02 to 3.0 parts by weight of CuO.
Inventors
- 👤 Toshiharu Yamashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:35
CPC Classifications
C; C03; C03C; C03C1/00; C03C1/10; C03C3/00; C03C3/12; C03C3/16; C03C3/17; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A green colored filter glass which absorbs light with wavelengths both in the range of about 400 to about 500 mμ and in the range of about 600 to 700 mμ and which has a high light transmittance at the wavelength region of about 500 to about 600 mμ, consisting essentially of (a) 100 parts by weight of a base glass consisting of, by weight, 40 to 85% of P 2 O 5 ; 2 to 10% of Al 2 O 3 ; 0 to 53% of BaO, 0 to 15% of Li 2 O, with the total proportion of 3 to 53% BaO + Li 2 O; 0 to 15% of NaO and/or K 2 O; 0 to 10% of MgO, CaO, ZnO and/or PbO; 0 to 20% of SrO and 0 to 5% of B 2 O 3 , ZrO 2 , TiO 2 and/or La 2 O 3 ; (b) 0.01 to 3.0 parts by weight of NiO; and (c) 0.02 to 3.0 parts by weight of CuO.
Claim 2
Dependent Claim
171 words
A green colored filter glass which absorbs light with wavelengths both in the range of about 400 to about 500 mμ and in the range of about 600 to 700 mμ and which has a high light transmittance at the wavelength region of about 500 to about 600 mμ, consisting essentially of (a) 100 parts by weight of a base glass consisting of, by weight, 40 to 85% of P 2 O 5 ; 2 to 10% of Al 2 O 3 ; 0 to 53% of BaO, 0 to 15% of Li 2 O, with the total proportion of 3 to 53% BaO + Li 2 O; 0 to 15% of NaO and/or K 2 O; 0 to 10% of MgO, CaO, ZnO and/or PbO; 0 to 20% of SrO and 0 to 5% of B 2 O 3 , ZrO 2 , TiO 2 and/or La 2 O 3 ; (b) 0.01 to 3.0 parts by weight of NiO; and (c) 0.02 to 3.0 parts by weight of CuO.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |