US2985633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene with organoboron compounds treated with oxygen
Assignee: Union Carbide Corp
•
Filing: 1958-10-30
•
Granted: 1961-05-23
•
Expires: 1978-10-30
Abstract
No abstract record available.
Inventors
- 👤 Frank J Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F5/00; C07F5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A PROCESS FOR THE COPOLYMERIZATION OF A MIXTURE OF ETHYLENE AND UP TO ABOUT 25 PERCFENT BY WEIGHT OF AT LEAST ONE OTHER POLYMERIZABLE VINYL MONOMER WHICH COMPRISES CONTACTING SAID MIXTURE AT A PRESSURE IN THE RANGE OF FROM ABOUT 2,000 TO ABOUT 100,000 POUNDS PER SQUARE INCH AND, AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 0.C TO ABOUT 250*C., WITH FROM ABOUT 0.001 MOLE PERCENT OF ABOUT 1 MOLE PERCENT BASED ON THE MOLAR QUANTITY OF SAID ETHYLENE OF A MIXTURE CONSISTING OF (A) AN ORGANOBORON HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |