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Patent US3193401A successfully refreshed from Google Patents.
US3193401A
Expired / Lapsed
US
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High index glass composition
Assignee: Cataphote Inc
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Filing: 1963-04-23
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Granted: 1965-07-06
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Expires: 1983-04-23
Abstract
No abstract record available.
Inventors
- 👤 Ezra M Alexander
- 👤 Labino Dominick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:58
CPC Classifications
C; C03; C03C; C03C3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 32% TO ABOUT 37% BY WEIGHT OF TIO2 FROM ABOUT 30% TO ABOUT 48% BY WEIGHT OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF BAO AND ZNO NOT LESS THAN ABOUT 30% BEING BAO, FROM ABOUT 3.5% TO ABOUT 4.5% OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO AND MGO, FROM 0 TO ABOUT 2.5% OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O AND LI2O, AND FROM ABOUT 12% TO ABOUT 21.0 BY WEIGHT OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SIO2, AL2O3, AND B2O3 NOT LESS THAN ABOUT 8% BEING SIO2.
Claim 2
Dependent Claim
116 words
A GLASS COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 32% TO ABOUT 37% BY WEIGHT OF TIO2 FROM ABOUT 30% TO ABOUT 48% BY WEIGHT OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF BAO AND ZNO NOT LESS THAN ABOUT 30% BEING BAO, FROM ABOUT 3.5% TO ABOUT 4.5% OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF CAO AND MGO, FROM 0 TO ABOUT 2.5% OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF NA2O, K2O AND LI2O, AND FROM ABOUT 12% TO ABOUT 21.0 BY WEIGHT OF AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SIO2, AL2O3, AND B2O3 NOT LESS THAN ABOUT 8% BEING SIO2.
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) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |