Patent US2594044A successfully refreshed from Google Patents.
US2594044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction of oils with dimethylammonium dimethylcarbamate
Assignee: EIDP Inc
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Filing: 1950-02-14
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Granted: 1952-04-22
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Expires: 1970-02-14
Abstract
No abstract record available.
Inventors
- 👤 Donald J Loder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:27
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR REFINING A MINERAL OIL WHICH COMPRISES SUBJECTING THE OIL IN LIQUID STATE TO EXTRACTION BY MEANS OF DIMETHYLAMMONIUM DIMETHYLCARBAMATE WHEREBY AN EXTRACT PHASE AND A RAFFINATE PHASE ARE OBTAINED, AND SEPARATING THE TWO PHASES.
Claim 2
Dependent Claim
37 words
A PROCESS FOR REFINING A MINERAL OIL WHICH COMPRISES SUBJECTING THE OIL IN LIQUID STATE TO EXTRACTION BY MEANS OF DIMETHYLAMMONIUM DIMETHYLCARBAMATE WHEREBY AN EXTRACT PHASE AND A RAFFINATE PHASE ARE OBTAINED, AND SEPARATING THE TWO PHASES.
References Cited (Backward Citations)
US1271387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |