US3380894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting hydrosols into solid microspheres
Assignee: WR Grace and Co
•
Filing: 1964-05-05
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Granted: 1968-04-30
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert P Flack
- 👤 Smith Jean Gillen
- 👤 Frederick T Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:56
CPC Classifications
C; C01; C01G; C01G43/00; C01G43/01; C01G43/025; B; B01; B01J; B01J2/00; B01J2/02; B01J2/06; B01J2/08; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/623; C01P; C01P2004/00; C01P2004/30; C01P2004/32; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN APPARATUS FOR MAKING HYDROSOLS INTO SPHERICAL SOLIDS COMPRISING IN COMBINATION, (A) A VERTICAL EXTRACTION COLUMN HAVING A TAPERED BOTTOM, (B) AN HYDROXOL INTRODUCTION MEANS COMMUNICATING WITH THE TOP OF THE COLUMN FOR INTRODUCING AN HYDROSOL IN THE FORM OF DROPLETS INTO THE TOP OF THE COLUMN, AND (C) SOLVENT RECOVERY MEANS CONNECTED TO THE TOP AND BOTTOM OF THE COLUMN FOR REMOVING DEHYDRATING SOLVENT FROM THE TOP THEREOF, FOR REMOVING SUFFICIENT WATER FROM THE SOLVENT TO RENDER IT SUITABLE FOR REUSE, AND FOR RETURNING THE RELCAIMED DEHYDRATING SOLVENT TO THE BOTTOM OF THE COLUMN, THE SOLVENT RECOVERY MEANS COMPRISING (1) A FIRST CONDUIT MEANS CONNECTED TO THE TOP OF THE EXTRACTION COLUMN FOR REMOVING SOLVENT THEREFROM, (2) A DISTILLATION MEANS COMMUNICATING WITH SAID FIRST CONDUIT MEANS FOR REMOVING FRM THE SOLVENT AT LEAST A PORTION OF WATER DISSOLVED THEREIN,
Claim 2
Independent Claim
140 words
AN APPARATUS FOR MAKING HYDROSOLS INTO SPHERICAL SOLIDS COMPRISING IN COMBINATION, (A) A VERTICAL EXTRACTION COLUMN HAVING A TAPERED BOTTOM, (B) AN HYDROXOL INTRODUCTION MEANS COMMUNICATING WITH THE TOP OF THE COLUMN FOR INTRODUCING AN HYDROSOL IN THE FORM OF DROPLETS INTO THE TOP OF THE COLUMN, AND (C) SOLVENT RECOVERY MEANS CONNECTED TO THE TOP AND BOTTOM OF THE COLUMN FOR REMOVING DEHYDRATING SOLVENT FROM THE TOP THEREOF, FOR REMOVING SUFFICIENT WATER FROM THE SOLVENT TO RENDER IT SUITABLE FOR REUSE, AND FOR RETURNING THE RELCAIMED DEHYDRATING SOLVENT TO THE BOTTOM OF THE COLUMN, THE SOLVENT RECOVERY MEANS COMPRISING (1) A FIRST CONDUIT MEANS CONNECTED TO THE TOP OF THE EXTRACTION COLUMN FOR REMOVING SOLVENT THEREFROM, (2) A DISTILLATION MEANS COMMUNICATING WITH SAID FIRST CONDUIT MEANS FOR REMOVING FRM THE SOLVENT AT LEAST A PORTION OF WATER DISSOLVED THEREIN,
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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) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |