US2728757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process with group v-a metal and metal borohydride catalyst
Assignee: Standard Oil Co
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Filing: 1953-08-31
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Granted: 1955-12-27
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Expires: 1973-08-31
Abstract
No abstract record available.
Inventors
- 👤 Field Edmund
- 👤 Feller Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR THE PRODUCTION OF AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300, WHICH PROCESS COMPRISES CONTACTING ETHLYENE AT A REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C. WITH AN ALKALI METAL BOROHYDRIDE AND A GROUP V-A METAL OXIDE CATALYST, AND SEPARATING AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300 THUS PRODUCED.
Claim 2
Dependent Claim
63 words
A PROCESS FOR THE PRODUCTION OF AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300, WHICH PROCESS COMPRISES CONTACTING ETHLYENE AT A REACTION TEMPERATURE BETWEEN ABOUT 75* C. AND ABOUT 325* C. WITH AN ALKALI METAL BOROHYDRIDE AND A GROUP V-A METAL OXIDE CATALYST, AND SEPARATING AN ETHYLENE POLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 300 THUS PRODUCED.
References Cited (Backward Citations)
No citation records indexed.
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 |