Patent US2817693A successfully refreshed from Google Patents.
US2817693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of oils from waxes
Assignee: Shell Development Co
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Filing: 1955-03-21
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Granted: 1957-12-24
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Koome Jacob
- 👤 George M Good
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:11
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/62; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A PROCESS FOR THE COVERSION OF PARAFFIN WAXES HAVING A BOILING POINT OF AT LEAST 300* C. TO OIL BY CATALYTIC ISOMERIZATION IN THE PRESENCE OF A SINGLE MASS OF SOLID ISOMERIZATION CATALYST IN A SINGLE REACTION ZONE AT A TEMPERATURE BETWEEN 300 AND 500* C. IN THE PRESENCE OF HYDROGEN UNDER A SUPERATMOSPHERIC PRESSURE, CHARACTERIZED IN THAT THE CATALYST IS INITIALLY SUBJECTED TO A PRESSURE OF AT LEAST 10 ATMOSPHERES ABOVE THE STEADY-STATE OPERATING PRESSURE.
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) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |