Patent US3942894A successfully refreshed from Google Patents.
Patent US2805165A successfully refreshed from Google Patents.
US2805165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic composition
Assignee: General Electric Co
•
Filing: 1955-04-25
•
Granted: 1957-09-03
•
Expires: 1975-04-25
Abstract
No abstract record available.
Inventors
- 👤 Goodman Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:42
CPC Classifications
H; H01; H01G; H01G7/00; H01G7/02; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A DIELECTRIC CERAMIC COMPOSITION CONSISTING ESSENTIALLY OF A FIRED COMBINATION OF LEAD OXIDE, NIOBIUM PENTOXIDE AND AN OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, CALCIUM, STRONTIUM, BARIUM AND MIXTURES THEREOF, IN SUCH PROPORTIONS THAT THE COMPOSITION HAS THE APPROXIMATE FORMULA (PB1-X''AR)(NBO3)2, WHEREIN A REPRESENTS THE RECITED GROUP AND IN WHICH X HAS A MAXIMUM VALUE OF ABOUT 0.001 AND A MAXIMUM VALUE OF ABOUT 0.85.
Claim 2
Dependent Claim
69 words
A DIELECTRIC CERAMIC COMPOSITION CONSISTING ESSENTIALLY OF A FIRED COMBINATION OF LEAD OXIDE, NIOBIUM PENTOXIDE AND AN OXIDE OF AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, CALCIUM, STRONTIUM, BARIUM AND MIXTURES THEREOF, IN SUCH PROPORTIONS THAT THE COMPOSITION HAS THE APPROXIMATE FORMULA (PB1-X''AR)(NBO3)2, WHEREIN A REPRESENTS THE RECITED GROUP AND IN WHICH X HAS A MAXIMUM VALUE OF ABOUT 0.001 AND A MAXIMUM VALUE OF ABOUT 0.85.
References Cited (Backward Citations)
US2584324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |