Patent US2093169A successfully refreshed from Google Patents.
Patent US3893893A successfully refreshed from Google Patents.
US3239452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coalescence process using polyolefin fiber
Assignee: Shell USA Inc
•
Filing: 1963-11-20
•
Granted: 1966-03-08
•
Expires: 1983-11-20
Abstract
No abstract record available.
Inventors
- 👤 Adolph Christiaan Van Beest
- 👤 Schuur Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:30
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06; B; B01; B01D; B01D11/00; B01D11/04; B01D17/00; B01D17/02; B01D17/04; B01D17/045; C10G17/00; C10G17/02; C10G17/04; C10G17/06; C10G27/00; C10G27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE COALESCENCE OF A HAZY HYDROCARBON OIL COMPRISING WATER DISPERSED IN KEROSENE WHICH COMPRISES PASSING SAID OIL THROUGH A LAYER FROM ABOUT 20 TO ABOUT 50 CENTIMETERS THICK OF POLYPROPYLENE FIBERS HAVING A FIBER DIAMETER OF FROM ABOUT 3 TO ABOUT 100 MICRONS, HAVING A FIBER LENGTH AT LEAST ABOUT 100 TIMES THE FIBER DIAMETER, WHEREIN SAID POLYPROPYLENE HAS A MOLECULAR WEIGHT OF FROM ABOUT 100,000 TO ABOUT 300,000, WHEREIN THE FREE SPACE OF THE LAYER IS FROM ABOUT 88 TO ABOUT 95%, AND WHEREIN SAID OIL IS PASSED THROUGH THE LAYER AT A SUPERFICIAL VELOCITY OF FROM ABOUT 0.5 TO ABOUT 6 CENTIMETERS PER SECOND, AND SUBSEQUENTLY EFFECTING PHASE SEPARATION.
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE COALESCENCE OF A HAZY HYDROCARBON OIL COMPRISING WATER DISPERSED IN KEROSENE WHICH COMPRISES PASSING SAID OIL THROUGH A LAYER FROM ABOUT 20 TO ABOUT 50 CENTIMETERS THICK OF POLYPROPYLENE FIBERS HAVING A FIBER DIAMETER OF FROM ABOUT 3 TO ABOUT 100 MICRONS, HAVING A FIBER LENGTH AT LEAST ABOUT 100 TIMES THE FIBER DIAMETER, WHEREIN SAID POLYPROPYLENE HAS A MOLECULAR WEIGHT OF FROM ABOUT 100,000 TO ABOUT 300,000, WHEREIN THE FREE SPACE OF THE LAYER IS FROM ABOUT 88 TO ABOUT 95%, AND WHEREIN SAID OIL IS PASSED THROUGH THE LAYER AT A SUPERFICIAL VELOCITY OF FROM ABOUT 0.5 TO ABOUT 6 CENTIMETERS PER SECOND, AND SUBSEQUENTLY EFFECTING PHASE SEPARATION.
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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |