US4314031A
Expired / Lapsed
US
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Tin-phosphorus oxyfluoride glasses
Assignee: Corning Glass Works
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Filing: 1980-06-17
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Granted: 1982-02-02
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Expires: 2000-06-17
Abstract
Abstract Glass compositions in the tin-phosphorus-oxyfluoride composition system exhibiting very low glass transition temperatures and capable of being modified by the addition of selected constituents to exhibit excellent stability in a humid environment, are described.
Inventors
- 👤 Leon M. Sanford
- 👤 Paul A. Tick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:51
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/23; C03C3/247; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/901; Y10S501/903
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
32 words
A glass comprising, in weight percent on an elemental basis as calculated from the batch, about 20-85% Sn, 2-20% P, 3-20% O, 10-36% F, and at least 75% total of Sn+P+O +F.
Claim 2
Dependent Claim
32 words
A glass comprising, in weight percent on an elemental basis as calculated from the batch, about 20-85% Sn, 2-20% P, 3-20% O, 10-36% F, and at least 75% total of Sn+P+O +F.
Claim 3
Dependent Claim
107 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 20-85% Sn, 2-20% P, 3-20% O, 10-36% F, 0-25% total of cation modifiers selected in the indicated proportions from the group consisting of: up to 25% Pb, up to 12% Zr, up to 10% Fe, up to 3% Ti, up to 1% Ca, up to 3% Ba, up to 2% Zn, up to 12% total of Fe+Ti+Ca+Ba+Zn, up to 3% total of Na +Li+K, up to 4% Al, and up to 1% Si, and 0-20% total of anion modifiers selected from the group consisting of Cl, Br and I.
Claim 4
Dependent Claim
107 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 20-85% Sn, 2-20% P, 3-20% O, 10-36% F, 0-25% total of cation modifiers selected in the indicated proportions from the group consisting of: up to 25% Pb, up to 12% Zr, up to 10% Fe, up to 3% Ti, up to 1% Ca, up to 3% Ba, up to 2% Zn, up to 12% total of Fe+Ti+Ca+Ba+Zn, up to 3% total of Na +Li+K, up to 4% Al, and up to 1% Si, and 0-20% total of anion modifiers selected from the group consisting of Cl, Br and I.
Claim 5
Dependent Claim
42 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 50-75% Sn, 2-11% P, 4-13% O, 14-25% F, and 0-22% Pb, wherein the glass has an F/F-max. ratio in the range of about 0.4-0.6.
Claim 6
Dependent Claim
42 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 50-75% Sn, 2-11% P, 4-13% O, 14-25% F, and 0-22% Pb, wherein the glass has an F/F-max. ratio in the range of about 0.4-0.6.
Claim 7
Dependent Claim
42 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 50-75% Sn, 2-11% P, 4-13% O, 14-25% F, and 0-12% Zr, wherein the glass has an F/F-max. ratio in the range of about 0.4-0.6.
Claim 8
Dependent Claim
42 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 50-75% Sn, 2-11% P, 4-13% O, 14-25% F, and 0-12% Zr, wherein the glass has an F/F-max. ratio in the range of about 0.4-0.6.
Claim 9
Dependent Claim
48 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 20-30% Sn, 15-20% P, 13-20% O, 30-36% F, 0-12% Pb, 0-4% Al, 0-3% Ba, and 0-1% Si, wherein the glass has an F/F-max. ratio in the range of about 0.7-0.8.
Claim 10
Dependent Claim
48 words
A glass consisting essentially, in weight percent on an elemental basis as calculated from the batch, of about 20-30% Sn, 15-20% P, 13-20% O, 30-36% F, 0-12% Pb, 0-4% Al, 0-3% Ba, and 0-1% Si, wherein the glass has an F/F-max. ratio in the range of about 0.7-0.8.
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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) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |