Patent US3285845A successfully refreshed from Google Patents.
US3285845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of waxes
Assignee: BP PLC
•
Filing: 1964-02-05
•
Granted: 1966-11-15
•
Expires: 1984-02-05
Abstract
No abstract record available.
Inventors
- 👤 Demeester Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:10
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/36; B01J23/70; B01J23/76; B01J23/84; B01J23/889; B01J23/8896; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G73/00; C10G73/42; C10G73/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR IMPROVING THE ODOUR AND COLOUR OF WAX COMPRISING CONTACTING THE WAX AT ELEVATED TEMPERATURE AND PRESSURE, THE TEMPERATURE BEING FROM ABOUT 250 TO 340*C., AND IN ADMIXTURE WITH HYDROGEN, THE PRESSURE OF HYDROGEN BEING AT LEAST 35 KG./CM2, WITH A CATALYST COMPRISING FROM 1 TO 25% BY WEIGHT OF RHENIUM OXIDE ON A SUPPORT.
Claim 2
Dependent Claim
57 words
A PROCESS FOR IMPROVING THE ODOUR AND COLOUR OF WAX COMPRISING CONTACTING THE WAX AT ELEVATED TEMPERATURE AND PRESSURE, THE TEMPERATURE BEING FROM ABOUT 250 TO 340*C., AND IN ADMIXTURE WITH HYDROGEN, THE PRESSURE OF HYDROGEN BEING AT LEAST 35 KG./CM2, WITH A CATALYST COMPRISING FROM 1 TO 25% BY WEIGHT OF RHENIUM OXIDE ON A SUPPORT.
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |