US2576378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectrics comprising essentially titania
Assignee: Steatite and Porcelain Products Ltd
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Filing: 1948-07-20
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Granted: 1951-11-27
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Expires: 1968-07-20
Abstract
No abstract record available.
Inventors
- 👤 Woodcock Jack
- 👤 Paridge John Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:51
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A DIELECTRIC BODY CONSTITUTING THE PRODUCT RESULTING FROM THE FIRING OF A POWDERED MIXTURE COMPRISING PREDOMINATELY TITANIA AND CONTAINING BETWEEN 0.22 AND 17% BY WEIGHT OF THORIA AND A QUANTITY OF MAGNESIA AT LEAST EQUAL TO THE MOLECULAR PROPORTION OF THE THORIA.
Claim 2
Dependent Claim
42 words
A DIELECTRIC BODY CONSTITUTING THE PRODUCT RESULTING FROM THE FIRING OF A POWDERED MIXTURE COMPRISING PREDOMINATELY TITANIA AND CONTAINING BETWEEN 0.22 AND 17% BY WEIGHT OF THORIA AND A QUANTITY OF MAGNESIA AT LEAST EQUAL TO THE MOLECULAR PROPORTION OF THE THORIA.
References Cited (Backward Citations)
US2398088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |