Patent US2728756A successfully refreshed from Google Patents.
US2728756A
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Di-tert-butyl peroxydicarbonate for ethylene polymerization
Assignee: Standard Oil Co
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Filing: 1952-09-30
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Granted: 1955-12-27
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Expires: 1972-09-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Friedlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:34
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07C; C07C409/00; C07C409/32; Y; Y10; Y10S; Y10S260/00; Y10S260/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
57 words
A PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES SUBJECTING ETHYLENE TO CONTACT WITH BETWEEN ABOUT 0.01 AND 2 PERCENT BY WEIGHT OF DI-TERT-BUTYL PEROXYDICARBONATE AT A TEMPERATURE BETWEEN ABOUT 25 TO 75* C. AND A PRESSURE BETWEEN ABOUT 5,000 TO 8,000 POUNDS PER SQUARE INCH, WHEREBY SAID ETHYLENE IS CONVERTED INTO NORMALLY SOLID PRODUCTS OF HIGH MOLECULAR WEIGHT.
References Cited (Backward Citations)
US2370588A
Cited
US2475648A
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 |