Patent US3341449A successfully refreshed from Google Patents.
US3341449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the purification of hydraulic fluids
Assignee: Individual
•
Filing: 1964-05-05
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Granted: 1967-09-12
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Howard Henderson Huram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:47
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A METHOD OF SEPARATING A WATER-GLYCOL SOLUTION HYDRAULIC FLUID FROM CONTAMINATION BY A MINERAL OIL HYDRAULIC FLUID MIXED THEREWITH AND BY OTHER CONTAMINANTS COLLOIDALLY SUSPENDED THEREIN COMPRISING HEATING SAID FLUID MIXTURE IN A VESSEL TO A TEMPERATURE WITHIN THE TEMPERATURE RANGE OF 90*F. TO A TEMPERATURE IN EXCESS OF 90*F. BUT NOT ABOVE THE SEPARATION POINT OF SAID WATER-GLYCOL FLUID THEREBY PRODUCING GASIFICATION, COAGULATION, AND SEPARATION OF SAID FLUID MIXTURE CAUSING SAID COLLOIDALLY SUSPENDED CONTAMINANTS TO COAGULATE AND TO ENTRAP GAS BUBBLES THEREIN TO PRODUCE A SPONGY FLOATABLE AGGLOMERATE RISING TO THE SURFACE OF SAID FLUID TO FORM A SURFACE STRATUM THEREON AND CAUSING SAID WATER-GLYCOL FLUID AND SAID OIL FLUIDS TO SEPARATE FROM EACH OTHER, CEASING TO HEAT SAID FLUIDS WHEN SAID TEMPERATURE IS REACHED, PERMITTING SAID SEPARATED OIL FLUID TO RISE TO A LEVEL ABOVE SAID WATER-GLYCOL FLUID TO FORM AN INTERMEDIATE STRATUM, PERMITTING SAID WATER-GLYCOL FLUID TO SETTLE BENEATH SAID OIL FLUID TO FORM A BOTTOM STRATUM, AND WITHDRAWING SAID PURIFIED WATER-GLYCOL FLUID BY INVERTED DECANTATION.
Claim 2
Independent Claim
169 words
A METHOD OF SEPARATING A WATER-GLYCOL SOLUTION HYDRAULIC FLUID FROM CONTAMINATION BY A MINERAL OIL HYDRAULIC FLUID MIXED THEREWITH AND BY OTHER CONTAMINANTS COLLOIDALLY SUSPENDED THEREIN COMPRISING HEATING SAID FLUID MIXTURE IN A VESSEL TO A TEMPERATURE WITHIN THE TEMPERATURE RANGE OF 90*F. TO A TEMPERATURE IN EXCESS OF 90*F. BUT NOT ABOVE THE SEPARATION POINT OF SAID WATER-GLYCOL FLUID THEREBY PRODUCING GASIFICATION, COAGULATION, AND SEPARATION OF SAID FLUID MIXTURE CAUSING SAID COLLOIDALLY SUSPENDED CONTAMINANTS TO COAGULATE AND TO ENTRAP GAS BUBBLES THEREIN TO PRODUCE A SPONGY FLOATABLE AGGLOMERATE RISING TO THE SURFACE OF SAID FLUID TO FORM A SURFACE STRATUM THEREON AND CAUSING SAID WATER-GLYCOL FLUID AND SAID OIL FLUIDS TO SEPARATE FROM EACH OTHER, CEASING TO HEAT SAID FLUIDS WHEN SAID TEMPERATURE IS REACHED, PERMITTING SAID SEPARATED OIL FLUID TO RISE TO A LEVEL ABOVE SAID WATER-GLYCOL FLUID TO FORM AN INTERMEDIATE STRATUM, PERMITTING SAID WATER-GLYCOL FLUID TO SETTLE BENEATH SAID OIL FLUID TO FORM A BOTTOM STRATUM, AND WITHDRAWING SAID PURIFIED WATER-GLYCOL FLUID BY INVERTED DECANTATION.
References Cited (Backward Citations)
US2693880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |