US2864919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic arcing plate material
Assignee: ITE Circuit Breaker Co
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Filing: 1955-05-11
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Granted: 1958-12-16
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Expires: 1975-05-11
Abstract
No abstract record available.
Inventors
- 👤 Allen E Stringfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:31
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01H; H01H9/00; H01H9/30; H01H9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A CIRCUIT INTERRUPTER ARC CHUTE A PLURATY OF CERAMIC ARCING PLATES HAVING A LOW COEFFIENCT TO THERMAL EXPANSION AND HIGH HEAT SHOCK RESISTANE AFTER REPAATED CIRCUIT INTERRUPTIONS MEANS FOR SUPPORTING AND MAINTAINI G SAID PLATES IN AN INTERLEAVED, SPACED-APART RELATIONSHIPSO THAT AN ARC MUST FOLLOW AN ELONGED PATH TO PASS THROUGH A STOCK OF SAID PLATES, SAID PLATES BEING COMPOSED OF A CERMIC MEATERIAL CONSISTING ESSENTIALLY OF 2 TO 13 PERCENT MGO, 37 TO 57 PERCENT AL233 AMD 38 TO 50 PERCENT SIO2 AD CONTAIMING MORE YHAN 50 PERCENT CORDINATE CRYSTALS.
Claim 2
Dependent Claim
92 words
IN A CIRCUIT INTERRUPTER ARC CHUTE A PLURATY OF CERAMIC ARCING PLATES HAVING A LOW COEFFIENCT TO THERMAL EXPANSION AND HIGH HEAT SHOCK RESISTANE AFTER REPAATED CIRCUIT INTERRUPTIONS MEANS FOR SUPPORTING AND MAINTAINI G SAID PLATES IN AN INTERLEAVED, SPACED-APART RELATIONSHIPSO THAT AN ARC MUST FOLLOW AN ELONGED PATH TO PASS THROUGH A STOCK OF SAID PLATES, SAID PLATES BEING COMPOSED OF A CERMIC MEATERIAL CONSISTING ESSENTIALLY OF 2 TO 13 PERCENT MGO, 37 TO 57 PERCENT AL233 AMD 38 TO 50 PERCENT SIO2 AD CONTAIMING MORE YHAN 50 PERCENT CORDINATE CRYSTALS.
References Cited (Backward Citations)
US2036190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |