US2843640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon conversion process employing a catalyst pretreatment
Assignee: California Research LLC
•
Filing: 1955-09-30
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Granted: 1958-07-15
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Expires: 1975-09-30
Abstract
No abstract record available.
Inventors
- 👤 Gordon E Langlois
- 👤 Edward D Noble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:46
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A HYDROCARBON POLYMERIZATION PROCESS WHEREIN A LIQUEFIED PROPYLENE-CONTAINING HYDROCARBON MATERIAL IS CONTACT WITH A CATALYST COMPRISING A THIN FILM OF A CONCENTRATED MINERAL ACID DISPOSED UPON A FRESH INERT, NONPOROUS, SOLID, SILICA-CONTAINING SUPPORT, THE IMPROVEMENT WHICH COMPRISES PRETREATING SAID FRSEH SUPPORT, PRIOR TO THE DISPOSITION OF SAID MINERAL FILM ACID THEREON, BY CONTACTING THE SUPPORT FOR A PERIOD OF AT LEAST 5 MINUTES WITH A MINERAL ACID AT A TERMPERATURE OF FROM ABOUT 100* TO 700*F.
Claim 2
Dependent Claim
77 words
IN A HYDROCARBON POLYMERIZATION PROCESS WHEREIN A LIQUEFIED PROPYLENE-CONTAINING HYDROCARBON MATERIAL IS CONTACT WITH A CATALYST COMPRISING A THIN FILM OF A CONCENTRATED MINERAL ACID DISPOSED UPON A FRESH INERT, NONPOROUS, SOLID, SILICA-CONTAINING SUPPORT, THE IMPROVEMENT WHICH COMPRISES PRETREATING SAID FRSEH SUPPORT, PRIOR TO THE DISPOSITION OF SAID MINERAL FILM ACID THEREON, BY CONTACTING THE SUPPORT FOR A PERIOD OF AT LEAST 5 MINUTES WITH A MINERAL ACID AT A TERMPERATURE OF FROM ABOUT 100* TO 700*F.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |