US3947281A
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High modulus rare earth and beryllium containing silicate glass compositions
Assignee: United States, AS REPRESENTED BY NATIONAL AERONAUTICS AND SPACE ADMINISTRATON
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Filing: 1972-06-02
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Granted: 1976-03-30
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Expires: 1992-06-02
Abstract
Abstract Glass compositions having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight, 20-43% SiO 2 , 8-21% Al 2 O 3 , 4-10% BeO, 27-58% of at least one oxide selected from a first group consisting of Y 2 O 3 , La 2 O 3 , Nd 2 O 3 , Ce 2 O 3 and the mixed rare earth oxides and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO 2 , ZnO and CaO, the molar ratio of BeO to the total content of said first group oxides being from 1.0-3.0.
Inventors
- 👤 James F. Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; C03C13/00; C03C3/089; C03C3/091
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
115 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of, by weight, approximately: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one oxide selected from a first group consisting of Y 2 O 3 , La 2 O 3 , Nd 2 O 3 , Ce 2 O 3 and mixtures thereof and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO 2 and ZnO, the molar ratio of BeO to the total conte nt of said first group oxides being from 1.0 to 3.0.
Claim 2
Dependent Claim
115 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of, by weight, approximately: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one oxide selected from a first group consisting of Y 2 O 3 , La 2 O 3 , Nd 2 O 3 , Ce 2 O 3 and mixtures thereof and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO 2 and ZnO, the molar ratio of BeO to the total conte nt of said first group oxides being from 1.0 to 3.0.
Claim 3
Dependent Claim
118 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one but not more than two oxides selected from a first group consisting of Y 2 O 3 , La 2 O 3 , Nd 2 O 3 and Ce 2 O 3 and 3-12% of not more than three oxides selected from a second group consisting of MgO, ZrO 2 , and ZnO, the molar ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 4
Dependent Claim
118 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one but not more than two oxides selected from a first group consisting of Y 2 O 3 , La 2 O 3 , Nd 2 O 3 and Ce 2 O 3 and 3-12% of not more than three oxides selected from a second group consisting of MgO, ZrO 2 , and ZnO, the molar ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 5
Dependent Claim
112 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of, by weight, approximately: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one oxide selected from a first group consisting of Y 2 O 3 , Nd 2 O 3 , Ce 2 O 3 and mixtures thereof and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO 2 , ZnO and CaO, the molar ratio ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 6
Dependent Claim
112 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of, by weight, approximately: 20-43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one oxide selected from a first group consisting of Y 2 O 3 , Nd 2 O 3 , Ce 2 O 3 and mixtures thereof and 3-12% of at least one oxide selected from a second group consisting of MgO, ZrO 2 , ZnO and CaO, the molar ratio ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 7
Dependent Claim
115 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight: 2- 43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one but not more than two oxides selected from a first group consisting of Y 2 O 3 , Nd 2 O 3 and Ce 2 O 3 and 3-12% of not more than three oxides selected from a second group consisting of MgO, ZrO 2 , ZnO, and CaO, the molar ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 8
Dependent Claim
115 words
A glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 110 million inches consisting essentially of approximately, by weight: 2- 43% SiO 2 , 4-10% BeO, 8-21% Al 2 O 3 , 27-58% of at least one but not more than two oxides selected from a first group consisting of Y 2 O 3 , Nd 2 O 3 and Ce 2 O 3 and 3-12% of not more than three oxides selected from a second group consisting of MgO, ZrO 2 , ZnO, and CaO, the molar ratio of BeO to the total content of said first group oxides being from 1.0 to 3.0.
Claim 9
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 150 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 34% Y 2 O 3 and 12% ZnO.
Claim 10
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 150 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 34% Y 2 O 3 and 12% ZnO.
Claim 11
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 160 million inches consisting essentially of about, by weight: 36% SiO 2 , 5% BeO, 21% Al 2 O 3 , 30% Y 2 O 3 and 8% MgO.
Claim 12
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 160 million inches consisting essentially of about, by weight: 36% SiO 2 , 5% BeO, 21% Al 2 O 3 , 30% Y 2 O 3 and 8% MgO.
Claim 13
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 160 million inches consisting essentially of about, by weight: 38% SiO 2 , 8% BeO, 11% Al 2 O 3 , 34% La 2 O 3 and 9% ZnO.
Claim 14
Dependent Claim
50 words
A fiberizable glass composition having a Young's modulus of at least 20 million psi and a specific modulus of at least 160 million inches consisting essentially of about, by weight: 38% SiO 2 , 8% BeO, 11% Al 2 O 3 , 34% La 2 O 3 and 9% ZnO.
Claim 15
Dependent Claim
56 words
A fiberizable glass composition having a Young's modulus of at least 19 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 31% SiO 2 , 8% BeO, 16% Al 2 O 3 , 30% Y 2 O 3 , 9% Ce 2 O 3 and 6% MgO.
Claim 16
Dependent Claim
56 words
A fiberizable glass composition having a Young's modulus of at least 19 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 31% SiO 2 , 8% BeO, 16% Al 2 O 3 , 30% Y 2 O 3 , 9% Ce 2 O 3 and 6% MgO.
Claim 17
Dependent Claim
59 words
A fiberizable glass composition having a Young's modulus of at least 19 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 3% MgO and 6% ZnO.
Claim 18
Dependent Claim
59 words
A fiberizable glass composition having a Young's modulus of at least 19 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 3% MgO and 6% ZnO.
Claim 19
Dependent Claim
59 words
A fiberizable glass composition having a Young's modulus of at least 18 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 15% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 6% ZnO and 4% CaO.
Claim 20
Dependent Claim
59 words
A fiberizable glass composition having a Young's modulus of at least 18 million psi and a specific modulus of at least 140 million inches consisting essentially of about, by weight: 30% SiO 2 , 8% BeO, 15% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 6% ZnO and 4% CaO.
Claim 21
Dependent Claim
51 words
A fiberizable glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 120 million inches consisting essentially of, by weight: 37% SiO 2 , 8% BeO, 10% Al 2 O 3 , 33% La 2 O 3 and 12% ZrO 2 .
Claim 22
Dependent Claim
51 words
A fiberizable glass composition having a Young's modulus of at least 16 million psi and a specific modulus of at least 120 million inches consisting essentially of, by weight: 37% SiO 2 , 8% BeO, 10% Al 2 O 3 , 33% La 2 O 3 and 12% ZrO 2 .
Claim 23
Dependent Claim
60 words
A fiberizable glass composition having a Young's modulus of at least 18 million psi and a specific modulus of at least 140 million inches consisting essentially of, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 2% MgO, 4% ZnO and 3% CaO.
Claim 24
Dependent Claim
60 words
A fiberizable glass composition having a Young's modulus of at least 18 million psi and a specific modulus of at least 140 million inches consisting essentially of, by weight: 30% SiO 2 , 8% BeO, 16% Al 2 O 3 , 29% Y 2 O 3 , 8% Ce 2 O 3 , 2% MgO, 4% ZnO and 3% CaO.
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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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |