Patent US3865114A successfully refreshed from Google Patents.
US3307958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic material
Assignee: Physical Sciences Corp
•
Filing: 1960-04-11
•
Granted: 1967-03-07
•
Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 John A Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:45
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0054; Y; Y10; Y10S; Y10S376/00; Y10S376/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
IN A HIGH-TEMPERATURE CONPRESSION-SEAL MATERIAL SUITABLE FOR USE WITH NUCLEAR REACTORS, ABORON-FREE CERAMIC MATERIAL MADE FROM A MIXTURE WHICH HAS BEEN SMELTED, QUENCHED, WET GROUND, AND FIRED, SAID MIXTURE CONSISTING OF FROM 31 TO 58 PERCENT BY WEIGHT OF THE OXIDE OF LEAD, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF ZINC OXIDE, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF ALUMINUM OXIDE, FROM 5 TO 13 PERCENT BY WEIGHT OF BISMUTH TRIOXIDE, FROM 20 TO 34 PERCENT BY WEIGHT OF SILICON DIOXIDE, THE PRESENCE UP TO ABOUT 9 PERCENT BY WEIGHT OF CERIUM DIOXIDE, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF MOLYBDENUM TRIOXIDE, AND UP TO ABOUT 4 PERCENT BY WEIGHT OF LANTHANUM OXIDE; SAID OXIDES CONSTITUTING A GLASS.
Claim 2
Dependent Claim
127 words
IN A HIGH-TEMPERATURE CONPRESSION-SEAL MATERIAL SUITABLE FOR USE WITH NUCLEAR REACTORS, ABORON-FREE CERAMIC MATERIAL MADE FROM A MIXTURE WHICH HAS BEEN SMELTED, QUENCHED, WET GROUND, AND FIRED, SAID MIXTURE CONSISTING OF FROM 31 TO 58 PERCENT BY WEIGHT OF THE OXIDE OF LEAD, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF ZINC OXIDE, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF ALUMINUM OXIDE, FROM 5 TO 13 PERCENT BY WEIGHT OF BISMUTH TRIOXIDE, FROM 20 TO 34 PERCENT BY WEIGHT OF SILICON DIOXIDE, THE PRESENCE UP TO ABOUT 9 PERCENT BY WEIGHT OF CERIUM DIOXIDE, THE PRESENCE UP TO ABOUT 5 PERCENT BY WEIGHT OF MOLYBDENUM TRIOXIDE, AND UP TO ABOUT 4 PERCENT BY WEIGHT OF LANTHANUM OXIDE; SAID OXIDES CONSTITUTING A GLASS.
Claim 3
Dependent Claim
61 words
IN A CERAMIC MATERIAL HAVING PROPERTIES OF ELECTRICAL INSULATION AND HAVING A LOW THERMONUCLEAR CAPTURE EFFECT: THE OXIDE OF BISMUTH WITH A RELATIVE WEIGHT OF ABOUT 5% TO 13%; THE OXIDE OF LEAD WITH A RELATIVE WEIGHT OF ABOUT 31% TO 58%; AND THE OXIDE OF SILICON WITH A RELATIVE WEIGHT OF ABOUT 20% TO 34%; SAID OXIDES CONSTITUTING A GLASS.
Claim 4
Dependent Claim
61 words
IN A CERAMIC MATERIAL HAVING PROPERTIES OF ELECTRICAL INSULATION AND HAVING A LOW THERMONUCLEAR CAPTURE EFFECT: THE OXIDE OF BISMUTH WITH A RELATIVE WEIGHT OF ABOUT 5% TO 13%; THE OXIDE OF LEAD WITH A RELATIVE WEIGHT OF ABOUT 31% TO 58%; AND THE OXIDE OF SILICON WITH A RELATIVE WEIGHT OF ABOUT 20% TO 34%; SAID OXIDES CONSTITUTING A GLASS.
References Cited (Backward Citations)
US2397004A
Cited
US2643020A
Cited
US2508511A
Cited
US2588920A
Cited
US2477329A
Cited
US2717946A
Cited
US2771375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |