Patent US2687990A successfully refreshed from Google Patents.
US2687990A
Expired / Lapsed
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Decolorization process
Assignee: ExxonMobil Oil Corp
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Filing: 1950-11-28
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Granted: 1954-08-31
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Expires: 1970-11-28
Abstract
No abstract record available.
Inventors
- 👤 Paul B Weisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:23
CPC Classifications
C; C10; C10G; C10G25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD FOR REMOVING COLOR BODIES FROM AN OIL CONTAINING THE SAME CHARACTERIZED BY A BOILING POINT RANGE OF BETWEEN ABOUT 300 AND ABOUT 800* .,A ND A. P. I. GRAVITY OF BETWEEN ABOUT 20 AND ABOUT 40, AND A NAPHTHENIC ACID CONTENT OF BETWEEN ABOUT 0.5 AND ABOUT 3 PER CENT BY WEIGHT, WHICH COMPRISES AGITATING SAID OIL WITH ORDINARY COTTON ADSORBENT TO INSURE THOROUGH ADMIXITURE OF COTTON AND ELURIATING THE SPENT COTTON WITH A POLAR SOLVENT.
Claim 2
Independent Claim
78 words
A METHOD FOR REMOVING COLOR BODIES FROM AN OIL CONTAINING THE SAME CHARACTERIZED BY A BOILING POINT RANGE OF BETWEEN ABOUT 300 AND ABOUT 800* .,A ND A. P. I. GRAVITY OF BETWEEN ABOUT 20 AND ABOUT 40, AND A NAPHTHENIC ACID CONTENT OF BETWEEN ABOUT 0.5 AND ABOUT 3 PER CENT BY WEIGHT, WHICH COMPRISES AGITATING SAID OIL WITH ORDINARY COTTON ADSORBENT TO INSURE THOROUGH ADMIXITURE OF COTTON AND ELURIATING THE SPENT COTTON WITH A POLAR SOLVENT.
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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |