US2684912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic body
Assignee: Individual
•
Filing: 1950-08-31
•
Granted: 1954-07-27
•
Expires: 1970-08-31
Abstract
No abstract record available.
Inventors
- 👤 George M Dreher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:01
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A CERAMIC COMPOSITION COMPRISING A SHAPED AND FIRED CERAMIC BODY CONSISTING ESSENTIALLY OF ZIRCOIN AND CORDIERITE IN THE RANGE OF ABOUT 15 TO 30% BY WEIGHT OF CORDIERITE AND 70 TO 85% BY WEIGHT OF ZIRCON, AND HAVING HIGH THERMAL SHOCK RESISTANCE AND BEING SUBSTANTIALLY NON-POROUS.
Claim 2
Dependent Claim
46 words
A CERAMIC COMPOSITION COMPRISING A SHAPED AND FIRED CERAMIC BODY CONSISTING ESSENTIALLY OF ZIRCOIN AND CORDIERITE IN THE RANGE OF ABOUT 15 TO 30% BY WEIGHT OF CORDIERITE AND 70 TO 85% BY WEIGHT OF ZIRCON, AND HAVING HIGH THERMAL SHOCK RESISTANCE AND BEING SUBSTANTIALLY NON-POROUS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |