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Patent US2581573A successfully refreshed from Google Patents.
US2581573A
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Method for separating waxy and oily materials
Assignee: ExxonMobil Oil Corp
•
Filing: 1948-06-09
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Granted: 1952-01-08
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Expires: 1968-06-09
Abstract
No abstract record available.
Inventors
- 👤 John L Biles
- 👤 Harold C Myers
- 👤 Petry Theodor Arthur
- 👤 Willard H Cowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:23
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1278023A
Cited
US1509325A
Cited
US1714133A
Cited
US1509326A
Cited
US1831433A
Cited
US2398101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |