US2701208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glasses
Assignee: Ohio State University Research Foundation
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Filing: 1954-05-10
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Granted: 1955-02-01
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Henry H Blau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:56
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/253; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A GLASS CONSISTING BY WEIGHT OF A TRACE TO 79% LEAD OXIDE, FROM 18% TO 99.9% GERMANIA AND FROM A TRACE TO 3% ZIRCONIA.
Claim 2
Dependent Claim
24 words
A GLASS CONSISTING BY WEIGHT OF A TRACE TO 79% LEAD OXIDE, FROM 18% TO 99.9% GERMANIA AND FROM A TRACE TO 3% ZIRCONIA.
Claim 3
Independent Claim
85 words
A METHOD OF MAKING A GLASS CONSISTING OF LEAD OXIDE, GERMANIA, AND A STABILIZING COMPONENT CONSISTING OF ZIRCONIA WHICH METHOD CONSISTS OF MELTING TOGETHER THE COMPONENTS OF WHICH LEAD OXIDE AND GERMANIA COMPRISE BY WEIGHT AT LEAST 97% OF THE MIXTURE AND OF WHICH GERMANIA COMPRISES BY WEIGHT AT LEAST 18% OF THE MIXTURE AND THEREAFTER REMOVING THE MELT TO AND MAINTAINING IT IN AN ATMOSPHERE FREE OF WATER AND WATER VAPOR, WHILE THE GLASS IS IN A HEATED CONDITION AND DURING THE COOLING PROCESS.
Claim 4
Independent Claim
85 words
A METHOD OF MAKING A GLASS CONSISTING OF LEAD OXIDE, GERMANIA, AND A STABILIZING COMPONENT CONSISTING OF ZIRCONIA WHICH METHOD CONSISTS OF MELTING TOGETHER THE COMPONENTS OF WHICH LEAD OXIDE AND GERMANIA COMPRISE BY WEIGHT AT LEAST 97% OF THE MIXTURE AND OF WHICH GERMANIA COMPRISES BY WEIGHT AT LEAST 18% OF THE MIXTURE AND THEREAFTER REMOVING THE MELT TO AND MAINTAINING IT IN AN ATMOSPHERE FREE OF WATER AND WATER VAPOR, WHILE THE GLASS IS IN A HEATED CONDITION AND DURING THE COOLING PROCESS.
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) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |