Patent US3671302A successfully refreshed from Google Patents.
US3671302A
Expired / Lapsed
US
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Impregnating porous ceramics with noncolloidal solids
Assignee: Dresser Industries Inc
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Filing: 1967-10-30
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Granted: 1972-06-20
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Expires: 1987-10-30
Abstract
Abstract IMPREGNATING POROUS CERAMIC ARTICLES WITH NONCOLLOIDAL CERAMIC PARTICLES COMPRISING, PREPARING A SUSPENSION IN A CARRIER FLUID OF NONCOLLOIDAL CERAMIC PARTICLES, IMMERSING THE CERAMIC ARTICLES IN THE SLURRY, MAINTAINING SAID PARTICLES DISPERSED, AND AGITATING THE SLURRY FOR SUFFICIENT PERIOD OF TIME TO IMPREGNATE AT LEAST A PORTION OF THE CERAMIC ARTICLES.
Inventors
- 👤 David J Nell
- 👤 Thomas W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:08
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5025; C04B41/5033; C04B41/80; C04B41/81; C04B41/85; C04B41/87
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |