Patent US2598725A successfully refreshed from Google Patents.
US2598725A
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Prevention of corrosion
Assignee: Sinclair Refining Co
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Filing: 1951-02-06
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Granted: 1952-06-03
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Expires: 1971-02-06
Abstract
No abstract record available.
Inventors
- 👤 David B Sheldahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:01
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C10L1/22; C10L1/232; C10L1/233; C10L1/2335; C10L1/24; C10L1/2431; C10L1/2437
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
LIGHT PETROLEUM DISTILLATE FRACTIONS INTO WHICH HAVE BEEN INCORPORATED AMOUNTS IN THE RANGE APPROXIMATING 0.6 TO 4.0 POUNDS OF AMMONIUM MAHOGANY SULFONATES ON THE OIL-FREE BASIS AND 0.4 TO 4.0 POUNDS OF MORPHOLINE, EACH PER ONE THOUSAND BARRELS OF PETROLEUM DISTILLATE.
Claim 2
Dependent Claim
41 words
LIGHT PETROLEUM DISTILLATE FRACTIONS INTO WHICH HAVE BEEN INCORPORATED AMOUNTS IN THE RANGE APPROXIMATING 0.6 TO 4.0 POUNDS OF AMMONIUM MAHOGANY SULFONATES ON THE OIL-FREE BASIS AND 0.4 TO 4.0 POUNDS OF MORPHOLINE, EACH PER ONE THOUSAND BARRELS OF PETROLEUM DISTILLATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |