US3729414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dewaxing and deoiling process
Assignee: Mobil Oil AS
•
Filing: 1971-08-16
•
Granted: 1973-04-24
•
Expires: 1991-08-16
Abstract
Abstract In a rotary filter dewaxing-deoiling process, the method and apparatus for improving the deoiling of the wax cake is described, characterized by utilizing a plurality of transverse solvent distributor pipes each of which dispense a relatively dense transverse curtain of solvent droplets on the wax cake thereby providing areas of solvent flooding interspaced with areas of considerably reduced solvent concentration.
Inventors
- 👤 R Harris
- 👤 W Moseley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:30
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/36; B; B01; B01D; B01D33/00; B01D33/06; B01D33/073; B01D33/09; B01D33/58; B01D33/60; B01D33/70; B01D33/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
The method of claim 1 wherein the solvent used to form the curtain of droplets is filtered.
Claim 2
Dependent Claim
23 words
The method of claim 1 wherein there are at least four curtains of solvent droplets on the ascending side of the wax cake.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |