EP0019342A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Precision pressed glass object, glass, method of preparing glass
Assignee: Koninklijke Philips NV
•
Filing: 1980-05-13
•
Granted: —
•
Expires: 2000-05-13
Abstract
Abstract Glass objects, lenses in particular, can be pressed with precision from a glass which contains 45-55 mol. % P 2 O 5 , 15-40 mot. %BaO. 5-15 mol. %Li 2 O, 5-35 mol. %PbO, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F.
Inventors
- 👤 Hendrik Jacobus Maria Joormann
- 👤 Hendrik Verweij
- 👤 Jan Haisma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
G; G02; G02B; G02B1/00; C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/17; C03C3/23; C03C3/247; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
Precision pressed object of glass, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5 - 35 mol. % PbO, 5-15 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F in the form of fluoride, wherein up to 25% of the BaO may be replaced by an equimolar quantity of one or more of the oxides CaO, MgO and SrO, and up to 25% of the Li 2 O may be replaced by an equimolar quantity of one or more other alkali metal oxides.
Claim 2
Dependent Claim
101 words
Precision pressed object of glass, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5 - 35 mol. % PbO, 5-15 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F in the form of fluoride, wherein up to 25% of the BaO may be replaced by an equimolar quantity of one or more of the oxides CaO, MgO and SrO, and up to 25% of the Li 2 O may be replaced by an equimolar quantity of one or more other alkali metal oxides.
Claim 3
Dependent Claim
49 words
Precision pressed object of glass as claimed in Claim 1, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-35 mol. % BaO, 9-22 mol. % PbO, 8.5-11.5 mol.-% Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F.
Claim 4
Dependent Claim
50 words
Precision pressed object of glass as claimed in Claim 1, characterized in that the glass contains 46-52 mol. % P 2 O 5 , 18-22 mol. % BaO, 18-22 mol. % PbO, 9-11 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F.
Claim 5
Dependent Claim
110 words
Glass containing phosphorous pentoxide, lead monoxode, an alkaline earth metal oxide and an alkali metal oxide, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5-35 mol. % PbO, 5-15 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F in the Form of fluoride, wherein up to 25% of the BaO may be replaced by an equimolar quanity of one or more of the oxides CaO, MgO and SrO ,and up to 25% of the Li 2 O may be replaced by an equimolar quantity of one or more other alkali metal oxides.
Claim 6
Dependent Claim
110 words
Glass containing phosphorous pentoxide, lead monoxode, an alkaline earth metal oxide and an alkali metal oxide, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5-35 mol. % PbO, 5-15 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F in the Form of fluoride, wherein up to 25% of the BaO may be replaced by an equimolar quanity of one or more of the oxides CaO, MgO and SrO ,and up to 25% of the Li 2 O may be replaced by an equimolar quantity of one or more other alkali metal oxides.
Claim 7
Dependent Claim
47 words
A glass as claimed in Claim 4, characterized in that the glass contains 45-55 mol. % P 2 O 5 , 15-35 mol. % BaO, 9-22 mol. % PbO, 8.5-11.5 mol. % Li 2 O, 0-2 mol. % A1 2 O 3 and 0-6 mol. % F.
Claim 8
Dependent Claim
47 words
A glass as claimed in Claim 4, characterized in that the glass contains 46-52 mol. % P 2 O 5 , 18-22 mol. % BaO, 18-22 mol. % PbO, 9-11 mol. % Li 2 O, 0-2 mol. % Al 2 O 3 and 0-6 mol. % F.
Claim 9
Dependent Claim
71 words
7 . A method of preparing glass containing P 2 O 5 , PbO and BaO by fusing together starting materials which are suitable for the said oxides, characterized in that a glass is prepared which contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5-35 mol. % PbO, 5-15 mol. % Li 2 0, 0-2 mol. % Al 2 0 3 and 0-6 mol. % F.
Claim 10
Dependent Claim
71 words
7 . A method of preparing glass containing P 2 O 5 , PbO and BaO by fusing together starting materials which are suitable for the said oxides, characterized in that a glass is prepared which contains 45-55 mol. % P 2 O 5 , 15-40 mol. % BaO, 5-35 mol. % PbO, 5-15 mol. % Li 2 0, 0-2 mol. % Al 2 0 3 and 0-6 mol. % F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.