US3373148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene
Assignee: Monsanto Co
•
Filing: 1965-07-01
•
Granted: 1968-03-12
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Expires: 1985-07-01
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Mackie
- 👤 Gordon H Lovett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:41
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/243; C; C08; C08F; C08F10/00; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PROCESS FOR THE MANUFACTURE OF ETHYLENE POLYMERS IN AN ELONGATED POLYMERIZATION ZONE INTO WHICH ETHYLENE-CONTAINING MONOMER AND FREE-RADICAL INTIATOR ARE INTRODUCED AT ELEVATED PRESSURES IN THE RANGE FROM 5,000 TO 60,000 P.S.I. TO ESTABLISH FLOW THROUGH SAID ELONGATED POLYMERIZATION ZONE AND ELEVATED TEMPERATURES CONTINUOUSLY INCREASING FROM THE INLET OF SAID ELONGATED POLYMERIZATION ZONE TO FORM A POLYMERIZATION MIXTURE CONTAINING POLYMER AND UNPOLYMERIZED MONOMER, THE IMPROVEMENT COMPRISING WITHDRAWING SAID POLYMERIZATION MIXTURE FROM SAID ELONGATED POLYMERIZATION ZONE AT AT LEAST ONE POINT WHERE THE TEMPERATURE IS ABOVE THE POLYMERIZATION INITIATION TEMPERATURE AND INTRODUCING SAID WITHDRAWN POLYMERIZATION MIXTURE INTO SAID ELONGATED POLYMERIZATION ZONE AT AT LEAST ONE POINT UPSTREAM WHERE SAID WITHDRAWN POLYMERIZATION MIXTURE IS SUBJECTED TO FURTHER POLYMERIZATION.
Claim 2
Dependent Claim
36 words
THE PROCESS OF CLAIM 2 WHEREIN SAID ESTHYLENE-CONTAINING A MONOMER IS ETHYLENE AND A COMONOMER SELECTED FROM THE GROUP CONSISTING OF AN OLEFIN HAVING NOT MORE THAN 8 CARBON ATOMS PER MOLECULE AND A VINYL ESTER.
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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |