US3348957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing clay products
Assignee: Canadian Patents and Development Ltd
•
Filing: 1964-10-08
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Granted: 1967-10-24
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Expires: 1984-10-08
Abstract
No abstract record available.
Inventors
- 👤 Chaklader Asoke Chandra Das
- 👤 Lawrence G Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:45
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/32; C04B33/326; C04B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR MANUFACTURING CLAY PRODUCTS COMPRISING HEATING A FORMED COMPOSITION CONTAINING AT LEAST A SUBSTNTIAL PROPORTION OF NATURAL, NON-CALCINED CLAY TO A TEMPERATURE SUFFICIENT TO CAUSE AT LEAST SOME DEHYDROXYLATION OF SAID CLAY TO OCCUR, SAID TEMPERATURE BEING LESS THAN 1000*C., AND APPLYING PRESSURE TO SAID COMPOSITION WHILE DEHYDROXYLATION OF SAID CLAY IS OCCURRING.
Claim 2
Dependent Claim
55 words
A PROCESS FOR MANUFACTURING CLAY PRODUCTS COMPRISING HEATING A FORMED COMPOSITION CONTAINING AT LEAST A SUBSTNTIAL PROPORTION OF NATURAL, NON-CALCINED CLAY TO A TEMPERATURE SUFFICIENT TO CAUSE AT LEAST SOME DEHYDROXYLATION OF SAID CLAY TO OCCUR, SAID TEMPERATURE BEING LESS THAN 1000*C., AND APPLYING PRESSURE TO SAID COMPOSITION WHILE DEHYDROXYLATION OF SAID CLAY IS OCCURRING.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |