US3198642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass compositions
Assignee: OI Glass Inc
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Filing: 1962-07-09
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Granted: 1965-08-03
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 Erwin C Hagedorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:44
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/062; C03C3/064; Y; Y10; Y10S; Y10S501/00; Y10S501/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A GLASS COMPOSITION HAVING A LIQUIDUS TEMPERATURE OF AT LEAST 80*F. BELOW THE TEMPERATURE AT WHICH THE LOG10 OF THE VISCOSITY IN POISES IS 5, AN INDEX OF REFRACTION, ND25, BELOW 1.5, A FIBER SOFTENING POINT BELOW 1425*F., A COEFFICIENT OF THERMAL EXPANSION OF LESS THAN 80X10**-7, AND A COMPOSITION CONSISTING ESSENTIALLY OF 35-50 WEIGHT PERCENT SIO2, 3-11 WEIGHT PERCENT AL2O3, 22-38 WEIGHT PERCENT B2O3, AND 15-25 WEIGHT PERCENT RB2O.
Claim 2
Dependent Claim
70 words
A GLASS COMPOSITION HAVING A LIQUIDUS TEMPERATURE OF AT LEAST 80*F. BELOW THE TEMPERATURE AT WHICH THE LOG10 OF THE VISCOSITY IN POISES IS 5, AN INDEX OF REFRACTION, ND25, BELOW 1.5, A FIBER SOFTENING POINT BELOW 1425*F., A COEFFICIENT OF THERMAL EXPANSION OF LESS THAN 80X10**-7, AND A COMPOSITION CONSISTING ESSENTIALLY OF 35-50 WEIGHT PERCENT SIO2, 3-11 WEIGHT PERCENT AL2O3, 22-38 WEIGHT PERCENT B2O3, AND 15-25 WEIGHT PERCENT RB2O.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |