US2728805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerisation of olefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1952-11-26
•
Granted: 1955-12-27
•
Expires: 1972-11-26
Abstract
No abstract record available.
Inventors
- 👤 Bohlbro Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:23
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; B; B01; B01J; B01J27/00; B01J27/06; C07C2527/00; C07C2527/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR POLYMERIZINGG NORMALLY GASEOUS OLEFINS TO FORM POLYMERS BOILING IN THE GASOLINE RANGE WHICH COMPRISES PASSING SAID OLEFINS THROUGH A CATALYST BED COMPRISING DIHDROXYFLUOROBORIC ACID ADBORDED ON A SOLID, GRANULAR ABSORBENT CARRIER MAINTAINED UNDER POLYMERIZATION CONDITIONS, AND, AT LEAST INTERMITTENTLY DURING SAID PROCESS, ADDING DIHYDROXYFLUOROBORIC ACID TO SAID CATALYST BED TO MAINTAIN THE ACTIVITY THEREOF AT A HIGH LEVEL.
Claim 2
Dependent Claim
61 words
A PROCESS FOR POLYMERIZINGG NORMALLY GASEOUS OLEFINS TO FORM POLYMERS BOILING IN THE GASOLINE RANGE WHICH COMPRISES PASSING SAID OLEFINS THROUGH A CATALYST BED COMPRISING DIHDROXYFLUOROBORIC ACID ADBORDED ON A SOLID, GRANULAR ABSORBENT CARRIER MAINTAINED UNDER POLYMERIZATION CONDITIONS, AND, AT LEAST INTERMITTENTLY DURING SAID PROCESS, ADDING DIHYDROXYFLUOROBORIC ACID TO SAID CATALYST BED TO MAINTAIN THE ACTIVITY THEREOF AT A HIGH LEVEL.
References Cited (Backward Citations)
US2109340A
Cited
US2224349A
Cited
US2171207A
Cited
US2183503A
Cited
US2404788A
Cited
US2467326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |