US3408748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drying and recovery process
Assignee: Dow Chemical Co
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Filing: 1966-08-17
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Granted: 1968-11-05
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Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Jr James L Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
F; F26; F26B; F26B21/00; F26B21/40; F26B13/00; F26B13/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD FOR REMOVING A VOLATILE, LIQUID SOLVENT FROM A MATERIAL WETTED BY THE SOLVENT, WHICH METHOD COMPRISES CONTACTING SAID SOLVENT WETTED MATERIAL WITH SUPERHEATED VAPOR OF AN ORGANIC SOLVENT IN A VAPOR CONFINING CHAMBER IN THE SUBSTANTIAL ABASENCE OF NONCONDENSABLE GAS; INTRODUCING SAID SUPERHEATED VAPOR AT A TEMPERATURE AND AMOUNT SUFFICIENT TO PROVIDE THE SOLE HEATING MEDIUM TO VAPORIZE SAID LIQUID SOLVENT BY MEANS OF SAID SUPERHEATED VAPOR FROM SAID MATERIAL: REMOVING SAID ORGANIC VAPOR AND THE VAPOR OF SAID LIQUID SOLVENT BY CONDENSING THE VAPORS AT INLET AND OUTLET AREAS OF SAID CHAMBER; AND, INTRODUCING SAID LIQUID SOLVENT WETTED MATERIAL THROUGH SAID INTLET AND WITHDRAWING SAID MATERIAL THROUGH SAID OUTLET , SAID INLET AND OUTLET EACH BEING BELOW THE POINT OF INTRODUCTION OF SAID SUPERHEATED VAPOR AND BELOW SAID CONDENSING MEANS.
Claim 2
Independent Claim
133 words
A METHOD FOR REMOVING A VOLATILE, LIQUID SOLVENT FROM A MATERIAL WETTED BY THE SOLVENT, WHICH METHOD COMPRISES CONTACTING SAID SOLVENT WETTED MATERIAL WITH SUPERHEATED VAPOR OF AN ORGANIC SOLVENT IN A VAPOR CONFINING CHAMBER IN THE SUBSTANTIAL ABASENCE OF NONCONDENSABLE GAS; INTRODUCING SAID SUPERHEATED VAPOR AT A TEMPERATURE AND AMOUNT SUFFICIENT TO PROVIDE THE SOLE HEATING MEDIUM TO VAPORIZE SAID LIQUID SOLVENT BY MEANS OF SAID SUPERHEATED VAPOR FROM SAID MATERIAL: REMOVING SAID ORGANIC VAPOR AND THE VAPOR OF SAID LIQUID SOLVENT BY CONDENSING THE VAPORS AT INLET AND OUTLET AREAS OF SAID CHAMBER; AND, INTRODUCING SAID LIQUID SOLVENT WETTED MATERIAL THROUGH SAID INTLET AND WITHDRAWING SAID MATERIAL THROUGH SAID OUTLET , SAID INLET AND OUTLET EACH BEING BELOW THE POINT OF INTRODUCTION OF SAID SUPERHEATED VAPOR AND BELOW SAID CONDENSING MEANS.
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |