Patent US2368131A successfully refreshed from Google Patents.
US3137657A
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US
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Ceramic product comprising sintered beryllia and bentonite and method
Assignee: Individual
•
Filing: 1962-04-11
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Granted: 1964-06-16
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Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 John F Quirk
- 👤 Fred H Lofftus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:28
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315; C04B35/00; C04B35/01; C04B35/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
AN IMPROVED CERAMIC PRODUCT OF ENHANCED RESISTANCE TO STRUCTURAL DAMAGE UPON NEUTRON IRRADIATION, WHICH PRODUCT COMPRISES A SINTERED UNITARY MASS OF BERYLLIA PARTICLES AND BENTONITE HAVING A PARTICLE SIZE SUBSTANTIALLY SMALLER THAN THAT OF SAID BERYLLIA.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |