Patent US2731452A successfully refreshed from Google Patents.
US2731452A
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Group via oxide-alkaline earth metal hydride catalyzed polymerization of olefins
Assignee: Standard Oil Co
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Filing: 1952-12-06
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Granted: 1956-01-17
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 Field Edmund
- 👤 Feller Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR THE PRODUCTION OF A POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300, THE STEPS OF CONTACTING A NORMALLY GASEOUS OLEFIN SELECTED FROM THE CLASS CONSISTING OF EHTYLENE, PROPYLENE AND MIXTURES CONTAINING ETHYLENE AND PROPYLENE WITH THE HYDRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF BE, MG, CA, SR AND BA AND AN OXIDE OF A METAL OF GROUP 6A OF THE
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR THE PRODUCTION OF A POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300, THE STEPS OF CONTACTING A NORMALLY GASEOUS OLEFIN SELECTED FROM THE CLASS CONSISTING OF EHTYLENE, PROPYLENE AND MIXTURES CONTAINING ETHYLENE AND PROPYLENE WITH THE HYDRIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF BE, MG, CA, SR AND BA AND AN OXIDE OF A METAL OF GROUP 6A OF THE
References Cited (Backward Citations)
US2385609A
Cited
US2691647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |