Patent US2806431A successfully refreshed from Google Patents.
US2642402A
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Olefin polymerization catalyst and its preparation
Assignee: Standard Oil Development Co
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Filing: 1950-05-20
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Granted: 1953-06-16
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Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene S Corner
- 👤 Charles S Lynch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:14
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; B; B01; B01J; B01J27/00; B01J27/14; B01J27/16; C07C2521/00; C07C2521/06; C07C2521/08; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IMPROVED OLEFIN POLYMERIZATION CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A PHOSPHORIC ACID DEPOSITED ON A SILICA GEL BASE, SAID CATALYST HAVING BEEN PREPARED BY HEAT TREATING A SILICA GEL BASE AT A TEMPERATURE IN THE RANGE OF 400*-1250* F. FOR AT LEAST 2 HOURS, FORMING A MIXTURE OF THE HEAT TREATED SILICA GEL AND A PHOSPHORIC ACID AND PULVERIZING SAID MIXTURE, DRYING THE PULVERIZED MIXTURE AT A TEMPERATURE IN THE RANGE OF 375*-425* F., AND CALCINING THE DRIED MIXTURE AT A TEMPERATURE IN THE RANGE OF 600*-1000* F. TO FORM AN ACITIVE POLYMERIZATION CATALYST CONTAINING IN THE RANGE OF 50-90% BY WEIGHT OF PHOSPHORIC ACID.
Claim 2
Dependent Claim
104 words
IMPROVED OLEFIN POLYMERIZATION CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A PHOSPHORIC ACID DEPOSITED ON A SILICA GEL BASE, SAID CATALYST HAVING BEEN PREPARED BY HEAT TREATING A SILICA GEL BASE AT A TEMPERATURE IN THE RANGE OF 400*-1250* F. FOR AT LEAST 2 HOURS, FORMING A MIXTURE OF THE HEAT TREATED SILICA GEL AND A PHOSPHORIC ACID AND PULVERIZING SAID MIXTURE, DRYING THE PULVERIZED MIXTURE AT A TEMPERATURE IN THE RANGE OF 375*-425* F., AND CALCINING THE DRIED MIXTURE AT A TEMPERATURE IN THE RANGE OF 600*-1000* F. TO FORM AN ACITIVE POLYMERIZATION CATALYST CONTAINING IN THE RANGE OF 50-90% BY WEIGHT OF PHOSPHORIC ACID.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |