US2769764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing napthas of improved characteristics from highly refined naphthas by treating the highly refined naphthas with a copper acetate
Assignee: Pure Oil Co
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Filing: 1954-04-01
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Granted: 1956-11-06
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Expires: 1974-04-01
Abstract
No abstract record available.
Inventors
- 👤 Annable Weldon Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:37
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PRODUCING SPECIAL SOLVENT NAPHTHAS FROM HIGHLY REFINED PETROLEUM HYDROCARBON MIXTURES CONTAINING SMALL AMOUNTS OF TOTAL SULFUR OF NOT MORE THAN ABOUT 0.025 WEIGHT PERCENT WHICH COMPRISES SUBJECTING SAID HYDROCARBON MIXTURES TO CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CUPRIC ACETATE AND BASIC CUPRIC ACETATE AND THEIR MIXTURES AT TEMPERATURES OF ABOUT 400 TO 500* F. AND SEPARATAING SPECIAL SOLVENT NAPHTHAS THEREFROM CHRACTERIZED BY THEIR ABILITY TO PASS THE DISTILLATION-CORROSION TEST.
Claim 2
Independent Claim
76 words
THE METHOD OF PRODUCING SPECIAL SOLVENT NAPHTHAS FROM HIGHLY REFINED PETROLEUM HYDROCARBON MIXTURES CONTAINING SMALL AMOUNTS OF TOTAL SULFUR OF NOT MORE THAN ABOUT 0.025 WEIGHT PERCENT WHICH COMPRISES SUBJECTING SAID HYDROCARBON MIXTURES TO CONTACT WITH A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CUPRIC ACETATE AND BASIC CUPRIC ACETATE AND THEIR MIXTURES AT TEMPERATURES OF ABOUT 400 TO 500* F. AND SEPARATAING SPECIAL SOLVENT NAPHTHAS THEREFROM CHRACTERIZED BY THEIR ABILITY TO PASS THE DISTILLATION-CORROSION TEST.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |