US3935018A
Expired / Lapsed
US
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Glasses
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-04-12
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Granted: 1976-01-27
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Expires: 1993-04-12
Abstract
Abstract Inorganic oxide glasses having compositions within the range (in moles percent) B2O3 1.2-3.5, P2O5 50-72, PbO 0-30, transition metal oxides 0-5, the remainder being oxides selected from alkali metal oxides, alkaline earths and zinc oxide.
Inventors
- 👤 Neil Hunter Ray
- 👤 William Derek Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:51
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/19; C03C3/21; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
113 words
An inorganic oxide glass having a mole % composition in the range B 2 o 3 1.2 to 3.5; P 2 o 5 50 to 72; PbO 0 to 30; at least one oxide selected from oxides of: Cu, Ag, Au, Sc, Y, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, Pd, and U, 0 to 5; the glass containing in addition at least one oxide selected from alkali metal oxides and at least one oxide selected from alkaline earth metal oxides and zinc oxide.
Claim 2
Dependent Claim
113 words
An inorganic oxide glass having a mole % composition in the range B 2 o 3 1.2 to 3.5; P 2 o 5 50 to 72; PbO 0 to 30; at least one oxide selected from oxides of: Cu, Ag, Au, Sc, Y, La, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, Pd, and U, 0 to 5; the glass containing in addition at least one oxide selected from alkali metal oxides and at least one oxide selected from alkaline earth metal oxides and zinc oxide.
Claim 3
Dependent Claim
21 words
An inorganic oxide glass as claimed in claim 1 which contains PbO in a range of 10 to 30 mole %.
Claim 4
Dependent Claim
59 words
An inorganic oxide glass as claimed in claim 1 having a mole % composition in the range: B 2 o 3 1.2 to 3.5; P 2 o 5 68 to 72; the glass containing in addition at least one oxide selected from alkali metal oxides and at least one oxide selected from alkaline earth metal oxides and zinc oxide.
Claim 5
Dependent Claim
26 words
An inorganic oxide glass as claimed in claim 2 in which the P 2 O 5 content lies in the range 50 to 58 mole %.
Claim 6
Dependent Claim
35 words
An inorganic oxide glass as claimed in claim 1 which contains P 2 O 5 in a proportion of 52 to 66 mole % and PbO in a proportion of less than 10 mole %.
Claim 7
Dependent Claim
24 words
An inorganic oxide glass as claimed in claim 5 which contains P 2 O 5 in a proportion of 55 to 66 mole %.
Claim 8
Dependent Claim
35 words
An inorganic oxide glass as claimed in claim 1 which contains P 2 O 5 in a proportion of 64 to 68 mole % and PbO in a proportion of 10 to 16 mole %.
Claim 9
Dependent Claim
27 words
An inorganic oxide glass as claimed in claim 1 which contains at least 2 mole % of oxide selected from alkaline earth metal oxides and zinc oxide.
Claim 10
Dependent Claim
23 words
An inorganic oxide glass as claimed in claim 8 which contains at least 14 mole % of oxide selected from alkali metal oxides.
Claim 11
Dependent Claim
19 words
An inorganic oxide as claimed in claim 8 which contains not more than 12.5 mole % of magnesium oxide.
Claim 12
Dependent Claim
18 words
Inorganic oxide glass as claimed in claim 6, comprising not more than 1 mole % of lead oxide.
Claim 13
Dependent Claim
18 words
Inorganic oxide glass as claimed in claim 6, comprising from 4 to 6 mole % of lead oxide.
Claim 14
Dependent Claim
27 words
Inorganic oxide glass as claimed in claim 12, comprising from 58 to 65 mole % P 2 O 5 and from 12-20 mole % Na 2 O.
Claim 15
Dependent Claim
29 words
Inorganic oxide glass as claimed in claim 13 having compositions within the range B 2 o 3 1.2-3.5 p 2 o 5 58-65 pbO 4-6 Na 2 O 12-20
Claim 16
Dependent Claim
12 words
The remainder being oxides selected from CaO, MgO and Li 2 O.
Claim 17
Dependent Claim
12 words
The remainder being oxides selected from CaO, MgO and Li 2 O.
Claim 18
Dependent Claim
37 words
An inorganic oxide glass as claimed in claim 14 having the following composition B 2 o 3 2.25 p 2 o 5 63.0 pbO 4.6 Na 2 O 13.5 CaO 4.5 MgO 4.5 Li 2 O 7.65.
Claim 19
Dependent Claim
27 words
Inorganic oxide glass as claimed in claim 1 having transformation temperatures not greater than 300°C and rates of attack by water not greater than 1.0%/min at 100°C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |