US4127415A
Expired / Lapsed
US
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Aluminum borophosphate glass compositions
Assignee: Verizon Laboratories Inc
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Filing: 1977-03-02
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Granted: 1978-11-28
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Expires: 1997-03-02
Abstract
Abstract Novel glass compositions are provided which are enclosed by the iso-composition lines, 2 and 18 mole percent P 2 O 5 , 30 and 70 mole percent Al 2 O 3 and 20 and 60 mole percent B 2 O 3 . The compositions can contain the usual oxide modifiers. These composition are characterized by refractive indices between about 1.47 and 1.58, densities between about 2.1 and 2.7 gm/cm 3 , thermal expansion coefficients between about 26 × 17 -7 /C° and 55 × 10 -7 /C°, and glass transition points of between about 600 and 820° C.
Inventors
- 👤 Carr L. W. Quackenbush
- 👤 Andrew G. Kolbeck
- 👤 Richard M. Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:38
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C13/048
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
An aluminum borophosphate glass composition comprising 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 and 20 to 60 mole percent B 2 O 3 .
Claim 2
Dependent Claim
36 words
An aluminum borophosphate glass composition comprising 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 and 20 to 60 mole percent B 2 O 3 .
Claim 3
Dependent Claim
67 words
An aluminum borophosphate glass composition of from 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 , and 20 to 60 mole percent B 2 O 3 ; further containing up to about 35 weight percent of a rare earth oxide, said percent of a rare earth oxide based upon the weight of said aluminum borophosphate glass.
Claim 4
Dependent Claim
67 words
An aluminum borophosphate glass composition of from 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 , and 20 to 60 mole percent B 2 O 3 ; further containing up to about 35 weight percent of a rare earth oxide, said percent of a rare earth oxide based upon the weight of said aluminum borophosphate glass.
Claim 5
Dependent Claim
68 words
An aluminum borophosphate glass composition of from 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 , and 20 to 60 mole percent B 2 O 3 ; further containing up to 20 mole percent ZrO 2 , said percent ZrO 2 based upon the total glass composition, said glass composition being characterized by increased glass transition temperature.
Claim 6
Dependent Claim
68 words
An aluminum borophosphate glass composition of from 2 to 18 mole percent P 2 O 5 , 30 to 70 mole percent Al 2 O 3 , and 20 to 60 mole percent B 2 O 3 ; further containing up to 20 mole percent ZrO 2 , said percent ZrO 2 based upon the total glass composition, said glass composition being characterized by increased glass transition temperature.
Claim 7
Dependent Claim
25 words
The glass composition of claim 2 wherein said rare earth oxide is selected from the group consisting of neodymium oxide, terbium oxide, and europium oxide.
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) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |