Patent US3034503A successfully refreshed from Google Patents.
Patent US2254597A successfully refreshed from Google Patents.
US2254597A
Expired / Lapsed
US
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Method of separating paraffin wax from oil
Assignee: ExxonMobil Oil Corp
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Filing: 1938-12-29
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Granted: 1941-09-02
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Expires: 1958-12-29
Abstract
No abstract record available.
Inventors
- 👤 Henry G Berger
- 👤 Gerald M Fisher
- 👤 Frederick C Ruff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:39
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-09-01 | 1945-03-03 | 1945-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-01 | 1949-03-03 | 1949-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-01 | 1953-03-03 | 1953-09-02 | $7700.00 | Window Closed / Lapsed |