US2987473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of clays
Assignee: JM Huber Corp
•
Filing: 1955-12-01
•
Granted: 1961-06-06
•
Expires: 1975-12-01
Abstract
No abstract record available.
Inventors
- 👤 Millman Nathan
- 👤 Whitley James Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:27
CPC Classifications
B; B28; B28C; B28C1/00; B28C1/003; B28C1/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR FRACTIONATING CLAY OF VARYING PARTICLE SIZE WHICH COMPRISES, SUBJECTING A DEFLOCCULENT-CONTAINING AQUEOUS SUSPENSION OF SAID CLAY AT A TEMPERATURE SUBSTANTIALLY ABOVE ROOM TEMPERATURE BUT BELOW THE BOILING POINT OF SAID AQUEOUS SUSPENSION TO A SEDIMENTATION FORCE OF AT LEAST THREE HUNDRED TIME THE FORCE OF GRAVITY TO EFFECT SEPARATION OF SAID SUSPENSION INTO AQUEOUS FRACTIONS OF DIFFERENT PARTICLE SIZE.
Claim 2
Dependent Claim
62 words
A PROCESS FOR FRACTIONATING CLAY OF VARYING PARTICLE SIZE WHICH COMPRISES, SUBJECTING A DEFLOCCULENT-CONTAINING AQUEOUS SUSPENSION OF SAID CLAY AT A TEMPERATURE SUBSTANTIALLY ABOVE ROOM TEMPERATURE BUT BELOW THE BOILING POINT OF SAID AQUEOUS SUSPENSION TO A SEDIMENTATION FORCE OF AT LEAST THREE HUNDRED TIME THE FORCE OF GRAVITY TO EFFECT SEPARATION OF SAID SUSPENSION INTO AQUEOUS FRACTIONS OF DIFFERENT PARTICLE SIZE.
References Cited (Backward Citations)
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Cited
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US2235955A
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Cited
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US2685369A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |