US2944910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic spark plug insulator
Assignee: Federal Mogul Ignition LLC
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Filing: 1958-07-09
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Granted: 1960-07-12
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Expires: 1978-07-09
Abstract
No abstract record available.
Inventors
- 👤 Harry G Schurecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/38; C; C04; C04B; C04B35/00; C04B35/01; H01B; H01B3/00; H01B3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A CERAMIC SPARK PLUG INSULATOR, AT LEAST THE SURFACE OF WHICH, AT THE FIRING END, IS PRODUCED BY SINTERING A BLEND CONSISTING ESSENTIALLY OF FROM ABOUT 30 PARTS TO 60 PARTS OF SNO2, FROM 35 PARTS TO 60 PARTS OF BEO, AND FROM 1 PART TO 5 PARTS OF A FLUX COMPRISING AT LEAST ABOUT 0.5 PART OF A MAGNESIUM SILICATE AND AT LEAST ABOUT 0.5 PART OF AN ALKALINE EARTH COMPOUND WHICH, AFTER FIRING, IS IN THE OXIDE FORM.
Claim 2
Dependent Claim
80 words
A CERAMIC SPARK PLUG INSULATOR, AT LEAST THE SURFACE OF WHICH, AT THE FIRING END, IS PRODUCED BY SINTERING A BLEND CONSISTING ESSENTIALLY OF FROM ABOUT 30 PARTS TO 60 PARTS OF SNO2, FROM 35 PARTS TO 60 PARTS OF BEO, AND FROM 1 PART TO 5 PARTS OF A FLUX COMPRISING AT LEAST ABOUT 0.5 PART OF A MAGNESIUM SILICATE AND AT LEAST ABOUT 0.5 PART OF AN ALKALINE EARTH COMPOUND WHICH, AFTER FIRING, IS IN THE OXIDE FORM.
References Cited (Backward Citations)
US2577369A
Cited
US2643192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |