US3279932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature electrical insulating material
Assignee: Physical Sciences Corp
•
Filing: 1962-08-03
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Granted: 1966-10-18
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Expires: 1982-08-03
Abstract
No abstract record available.
Inventors
- 👤 John A Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:03
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0036; C03C10/0045; C03C10/0054
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
IN COMBINATION IN A CERAMIC MATERIAL HAVING PROPERTIES OF A HIGH ELECTRICAL INSULATION OF AT LEAST 6X105 OHMS OVER AN EXTENDED RANGE OF TEMPERATURES TO APPROXIMATELY 1800 DEGREES FAHRENHEIT: (A) THE OXIDE OF CALCIUM IN THE RANGE OF APPROXIMATELY 20 TO 30% BY WEIGHT, (B) THE OXIDE OF MAGNESIUM IN THE RANGE OF APPROXIMATELY 5 TO 7% BY WEIGHT, (C) THE OXIDE OF ALUMINUM IN THE RANGE OF APPROXIMATELY 3 TO 7% BY WEIGHT, (D) THE OXIDE OF BORON IN THE RANGE OF APPROXIMATELY 7 TO 14% BY WEIGHT, (E) THE OXIDE OF SILICON IN THE RANGE OF 20 TO 32% BY WEIGHT, AND (F) THE OXIDE OF TITANIUM IN THE RANGE OF APPROXIMATELY 20 TO 32% BY WEIGHT.
Claim 2
Dependent Claim
119 words
IN COMBINATION IN A CERAMIC MATERIAL HAVING PROPERTIES OF A HIGH ELECTRICAL INSULATION OF AT LEAST 6X105 OHMS OVER AN EXTENDED RANGE OF TEMPERATURES TO APPROXIMATELY 1800 DEGREES FAHRENHEIT: (A) THE OXIDE OF CALCIUM IN THE RANGE OF APPROXIMATELY 20 TO 30% BY WEIGHT, (B) THE OXIDE OF MAGNESIUM IN THE RANGE OF APPROXIMATELY 5 TO 7% BY WEIGHT, (C) THE OXIDE OF ALUMINUM IN THE RANGE OF APPROXIMATELY 3 TO 7% BY WEIGHT, (D) THE OXIDE OF BORON IN THE RANGE OF APPROXIMATELY 7 TO 14% BY WEIGHT, (E) THE OXIDE OF SILICON IN THE RANGE OF 20 TO 32% BY WEIGHT, AND (F) THE OXIDE OF TITANIUM IN THE RANGE OF APPROXIMATELY 20 TO 32% BY WEIGHT.
Claim 3
Dependent Claim
104 words
IN COMBINATION IN A CERAMIC MATERIAL HAVING PROPERTIES OF ELECTRICAL INSULATION OVER AN EXTENDED RANGE OF TEMPERATURES TO APPROXIMATELY 1800 DEGREES FAHRENHEIT: (A) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF CALCIUM AND BARIUM IN ABOUT 20% TO 30% BY WEIGHT, (B) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF TITANIUM AND CERIUM IN ABOUT 20% TO 32% BY WEIGHT, (C) THE OXIDE OF SILICON IN ABOUT 20% TO 32% BY WEIGHT, AND (D) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF ALUMINUM AND LANTHANUM IN ABOUT 3% TO 7% BY WEIGHT.
Claim 4
Dependent Claim
104 words
IN COMBINATION IN A CERAMIC MATERIAL HAVING PROPERTIES OF ELECTRICAL INSULATION OVER AN EXTENDED RANGE OF TEMPERATURES TO APPROXIMATELY 1800 DEGREES FAHRENHEIT: (A) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF CALCIUM AND BARIUM IN ABOUT 20% TO 30% BY WEIGHT, (B) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF TITANIUM AND CERIUM IN ABOUT 20% TO 32% BY WEIGHT, (C) THE OXIDE OF SILICON IN ABOUT 20% TO 32% BY WEIGHT, AND (D) AT LEAST ONE MATERIAL FROM THE GROUP CONSISTING OF THE OXIDES OF ALUMINUM AND LANTHANUM IN ABOUT 3% TO 7% BY WEIGHT.
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |