US2986475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for coating discrete solids
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1958-11-05
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Granted: 1961-05-30
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Expires: 1978-11-05
Abstract
No abstract record available.
Inventors
- 👤 Howard W Mesnard
- 👤 Rosen Earl
- 👤 Morton W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:58
CPC Classifications
A; A23; A23G; A23G3/00; A23G3/02; A23G3/20; A23G3/2092; A23G3/2076; A23G3/2084; A61; A61J; A61J3/00; A61J3/005; A61K; A61K9/00; A61K9/20; A61K9/28; A61K9/2893; A61K9/48; A61K9/50; A61K9/5089; Y; Y10; Y10S; Y10S118/00; Y10S118/05; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
262 words
THE METHOD OF COATING DISCRETE SOLIDS WHICH COMPRISES INTRODUCING A BATCH OF DISCRETE SOLIDS INTO AN UNOBSTRUCTED UPSTANDING ZONE AND MAINTAINING SAID DISCRETE SOLIDS IN CONTINUOUS CIRCULATION IN SAID ZONE, SPRAYING A LIQUEFIED COATING MATERIAL INTO A PORTION OF SAID ZONE, SAID DISCRETE SOLIDS BEING MAINTAINED IN CONTINUOUS CIRCULATION THROUGH THE PORTION OF SAID ZONE CONTAINING THE LIQUEFIED COATING MATERIAL AND THROUGH AT LEAST PART OF THE REMAINING PORTION OF SAID ZONE TO REPEATEDLY APPLY AND SOLIDFY THE COATING MATERIAL ON THE DISCRETE SOLIDS AND COMPLETELY COAT THE DISCRETE SOLIDS BY MAINTAINING A RELATIVELY HIGH VELOCITY GAS COLUMN BELOW AND DISCHARGING UPWARDLY WITHOUT OBSTRUCTION INTO THE MIDELE OF SAID ZONE WHICH HAS A CROSS-SECTIONAL AREA OF FROM ABOUT 4 TO ABOUT 100 TIMES THE CROSS-SECTIONAL AREA OF FROM ABOUT 4 TO ABOUT LOW SAID ZONE, SAID GAS COLUMN CARRYING THE SOLIDS UPWARDLY THROUGH THE MIDELE OF SAID ZONE WITH A GRADUALLY REDUCING VELOCITY IN THE UPPER PORTION OF SAID ZONE TO PERMIT THEM TO DROP DOWNWARDLY ADJACENT THE PERIPHERY OF SAID ZONE AND BY DIRECTING SAID DISCRETE SOLIDS BACK ONTO SAID GAS COLUMN WHEN THEY DROP INTO THE LOWER PORTION OF SAID ZONE, THE POINT OF INTRODUCTION OF SAID LIQUEFIED COATING MATERIAL BEING SPACED FROM THE POINT AT WHICH THE GAS COLUMN DISCHARGES INTO SAID ZONE, EXHAUSTING GAS FROM THE UPPER PORTION OF SAID ZONE AND CHANGING THE RATE OF FLOW OF THE GAS IN SAID COLUMN TO REMOVE SAID BATCH OF COATED DISCRETE SOLIDS FORM SAID ZONE AFTER THE DESIRED AMOUNT OF COATING MATERIAL HAS BEEN APPLIED TO THE DISCRETE SOLIDS.
Claim 2
Independent Claim
262 words
THE METHOD OF COATING DISCRETE SOLIDS WHICH COMPRISES INTRODUCING A BATCH OF DISCRETE SOLIDS INTO AN UNOBSTRUCTED UPSTANDING ZONE AND MAINTAINING SAID DISCRETE SOLIDS IN CONTINUOUS CIRCULATION IN SAID ZONE, SPRAYING A LIQUEFIED COATING MATERIAL INTO A PORTION OF SAID ZONE, SAID DISCRETE SOLIDS BEING MAINTAINED IN CONTINUOUS CIRCULATION THROUGH THE PORTION OF SAID ZONE CONTAINING THE LIQUEFIED COATING MATERIAL AND THROUGH AT LEAST PART OF THE REMAINING PORTION OF SAID ZONE TO REPEATEDLY APPLY AND SOLIDFY THE COATING MATERIAL ON THE DISCRETE SOLIDS AND COMPLETELY COAT THE DISCRETE SOLIDS BY MAINTAINING A RELATIVELY HIGH VELOCITY GAS COLUMN BELOW AND DISCHARGING UPWARDLY WITHOUT OBSTRUCTION INTO THE MIDELE OF SAID ZONE WHICH HAS A CROSS-SECTIONAL AREA OF FROM ABOUT 4 TO ABOUT 100 TIMES THE CROSS-SECTIONAL AREA OF FROM ABOUT 4 TO ABOUT LOW SAID ZONE, SAID GAS COLUMN CARRYING THE SOLIDS UPWARDLY THROUGH THE MIDELE OF SAID ZONE WITH A GRADUALLY REDUCING VELOCITY IN THE UPPER PORTION OF SAID ZONE TO PERMIT THEM TO DROP DOWNWARDLY ADJACENT THE PERIPHERY OF SAID ZONE AND BY DIRECTING SAID DISCRETE SOLIDS BACK ONTO SAID GAS COLUMN WHEN THEY DROP INTO THE LOWER PORTION OF SAID ZONE, THE POINT OF INTRODUCTION OF SAID LIQUEFIED COATING MATERIAL BEING SPACED FROM THE POINT AT WHICH THE GAS COLUMN DISCHARGES INTO SAID ZONE, EXHAUSTING GAS FROM THE UPPER PORTION OF SAID ZONE AND CHANGING THE RATE OF FLOW OF THE GAS IN SAID COLUMN TO REMOVE SAID BATCH OF COATED DISCRETE SOLIDS FORM SAID ZONE AFTER THE DESIRED AMOUNT OF COATING MATERIAL HAS BEEN APPLIED TO THE DISCRETE SOLIDS.
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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |