US3223614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decolorization of waxes by dialysis
Assignee: Sunoco Inc
•
Filing: 1962-05-14
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Granted: 1965-12-14
•
Expires: 1982-05-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Paulson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:38
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/26; B01D71/262; B01D61/00; B01D61/24; B01D61/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
PROCESS OF DECOLORIZING PETROLEUM WAX WHICH COMPRISES DIALYZING A SOLUTION OF THE WAX IN A HYDROCARBON SOLVENT THROUGH A POLYPROPYLENE FILM, SAID FILM HAVING A SPECIFIC GRAVITY OF .87-.92 AND HAVING A MAXIMUM EX-
Claim 2
Dependent Claim
34 words
PROCESS OF DECOLORIZING PETROLEUM WAX WHICH COMPRISES DIALYZING A SOLUTION OF THE WAX IN A HYDROCARBON SOLVENT THROUGH A POLYPROPYLENE FILM, SAID FILM HAVING A SPECIFIC GRAVITY OF .87-.92 AND HAVING A MAXIMUM EX-
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |