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Patent US3305371A successfully refreshed from Google Patents.
US3305371A
Expired / Lapsed
US
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Glass compositions
Assignee: Compagnie de Saint Gobain SA
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Filing: 1962-04-17
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Granted: 1967-02-21
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Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Lajarte Stephane Dufaure De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
C; C03; C03C; C03C3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
GLASS CONTAINING NO ELEMENTS OFFERING SUBSTANTIAL AREAS OF CAPTURE OF NEUTRONS, WHICH DOES NOT GENERATE RADIOACTIVE ISOTOPES DURING IRRADIATION BY NEUTRONS, WHICH CONSISTS IN ITS ESSENTIAL INGREDIENTS OF THE FOLLOWING BY WEIGHT: SIO2 40-50%, AL2O3 10-25%, ONE OR MORE OF THE OXIDES TIO2 AND FE2O BUT NOT TO EXCEED 15% OF EITHER OF THEM, THE TOTAL OF SAID SIO2, AL2O3, TIO2 AND FE2O3 NOT EXCEEDING 80%, BAO, 5-10%, CAO AND MGO, THE CONTENT OF CAO NOT EXCEEDING 20% IN SUCH PROPORTIONS THAT THE TOTAL OF BAO+CAO+MGO IS 15-35%, AND F IN AN AMOUNT UP TO ABOUT 5% OF THE TOTAL OF THE OTHER INGREDIENTS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |