Patent US2767119A successfully refreshed from Google Patents.
US2767119A
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Process for decolorizing petroleum hydrocarbons with a pyrrolidone
Assignee: GAF Chemicals Corp
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Filing: 1955-04-07
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Granted: 1956-10-16
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Expires: 1975-04-07
Abstract
No abstract record available.
Inventors
- 👤 Americo L Forchielli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:34
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/20; C10G29/22; C10G29/24; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C10G73/00; C10G73/42; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10N; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
THE PROCESS OF DECOLORIZING HYDROCARBONS WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A PYRROLIDONE HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
18 words
THE PROCESS OF DECOLORIZING HYDROCARBONS WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A PYRROLIDONE HAVING THE FOLLOWING GENERAL FORMULA:
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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |