US2668866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of paraffin wax
Assignee: Shell Development Co
•
Filing: 1951-08-14
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Granted: 1954-02-09
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Expires: 1971-08-14
Abstract
No abstract record available.
Inventors
- 👤 George M Good
- 👤 John W Gibson
- 👤 Bernard S Greensfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:13
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/62; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE PROCESS FOR THE ISOMERIZATION OF PARAFFIN WAX WHICH COMPRISES VAPORIZING A NORMALLY SOLID PARAFFIN WAX AND CONTACTING THE WAX COMPLETELY IN THE VAPOR PHASE WITH AT LEAST ONE MOLE OF HYDROGEN PER MOLE OF SAID WAX WITH A SUPPORTED PLATINUM CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* C. AND ABOUT 550* C.
Claim 2
Dependent Claim
53 words
THE PROCESS FOR THE ISOMERIZATION OF PARAFFIN WAX WHICH COMPRISES VAPORIZING A NORMALLY SOLID PARAFFIN WAX AND CONTACTING THE WAX COMPLETELY IN THE VAPOR PHASE WITH AT LEAST ONE MOLE OF HYDROGEN PER MOLE OF SAID WAX WITH A SUPPORTED PLATINUM CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* C. AND ABOUT 550* C.
References Cited (Backward Citations)
US2475358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |