US3395086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of moisture from organic liquid solvent
Assignee: Research Development Co
•
Filing: 1963-09-11
•
Granted: 1968-07-30
•
Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 Victor Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:02
CPC Classifications
D; D06; D06F; D06F43/00; D06F43/08; D06F43/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS OF PURIFYING A USED CLEANING COMPOSITION COMPOSED OF A MIXTURE CONTAINING A CHLORO-FLUOROHYDROCARBON SOLVENT, WATER AND A SURFACE ACTIVE MATERIAL, COMPRISING THE STEPS OF: HEATING SAID MIXTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF SAID SOLVENT, COOLING AND COLLECTING THE CONDENSATE WHICH CONTAINS SOLVENT, MOISTURE AND AN AMOUNT OF SURFACE ACTIVE MATERIAL SUFFICIENT TO SUSPEND SAID MOISTURE IN SAID SOLVENT, PASSING SAID CONDENSATE TO A MEMBRANE COMPOSED OF FOAMED POLYURETHANE TO THEREBY COALESCE THE WATER PHASE WITHIN SAID MEMBRANE, AND SUBSEQUENTLY SEPARATING THE TWO LIQUIDS.
Claim 2
Dependent Claim
88 words
A PROCESS OF PURIFYING A USED CLEANING COMPOSITION COMPOSED OF A MIXTURE CONTAINING A CHLORO-FLUOROHYDROCARBON SOLVENT, WATER AND A SURFACE ACTIVE MATERIAL, COMPRISING THE STEPS OF: HEATING SAID MIXTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF SAID SOLVENT, COOLING AND COLLECTING THE CONDENSATE WHICH CONTAINS SOLVENT, MOISTURE AND AN AMOUNT OF SURFACE ACTIVE MATERIAL SUFFICIENT TO SUSPEND SAID MOISTURE IN SAID SOLVENT, PASSING SAID CONDENSATE TO A MEMBRANE COMPOSED OF FOAMED POLYURETHANE TO THEREBY COALESCE THE WATER PHASE WITHIN SAID MEMBRANE, AND SUBSEQUENTLY SEPARATING THE TWO LIQUIDS.
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |