Patent US4191160A successfully refreshed from Google Patents.
Patent US3274310A successfully refreshed from Google Patents.
US3274310A
Expired / Lapsed
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Method of making a porous ceramic product
Assignee: Celotex Corp
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Filing: 1964-03-19
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Granted: 1966-09-20
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Expires: 1984-03-19
Abstract
No abstract record available.
Inventors
- 👤 Kohl Lou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:12
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; C04B20/1074; C04B38/00; C04B38/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF MAKING A POROUS CERAMIC PRODUCT COMPRISING THE STEPS OF FORMING A SHAPED WET MASS OF EXPANDED MINERAL AGGREGATE IN PARTICULATE FROM CARRYING A THIN AQUEOUS CLAY COATING OF BETWEEN 50 AND 300 X 10-7 CM. IN THICKNESS ON THE PARTICLES, SAID MASS HAVING A WATER CONTENT OF FROM ABUT 9% TO 26% BY VOLUME OF THE DRYINGREDIENTS, PLACING SAID SHAPED WET MASS INTO A FURNACE WHOSE TEMPERATURE IS WITHIN THE RANGE OF BETWEEN 1450* F. AND 1700*F., AND MAINTAINING SAID WET MASS AT A SURFACE TEMPERATURE WITHIN SAID RANGE FROM A TIME PERIOD, THE DURATION O SAID TIME PERIOD BEING FROM A MINUM OF 8 MINUTES AT SAID TEMPERATURE OF 1700*F. TO A MAXIMUM OF 60 MINUTES AT SAID TEMPERATURE OF 1450*F.
Claim 2
Independent Claim
125 words
THE METHOD OF MAKING A POROUS CERAMIC PRODUCT COMPRISING THE STEPS OF FORMING A SHAPED WET MASS OF EXPANDED MINERAL AGGREGATE IN PARTICULATE FROM CARRYING A THIN AQUEOUS CLAY COATING OF BETWEEN 50 AND 300 X 10-7 CM. IN THICKNESS ON THE PARTICLES, SAID MASS HAVING A WATER CONTENT OF FROM ABUT 9% TO 26% BY VOLUME OF THE DRYINGREDIENTS, PLACING SAID SHAPED WET MASS INTO A FURNACE WHOSE TEMPERATURE IS WITHIN THE RANGE OF BETWEEN 1450* F. AND 1700*F., AND MAINTAINING SAID WET MASS AT A SURFACE TEMPERATURE WITHIN SAID RANGE FROM A TIME PERIOD, THE DURATION O SAID TIME PERIOD BEING FROM A MINUM OF 8 MINUTES AT SAID TEMPERATURE OF 1700*F. TO A MAXIMUM OF 60 MINUTES AT SAID TEMPERATURE OF 1450*F.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |