US3178404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyethylene in a two zone reactor employing caprylyl peroxide in the first zone as the catalyst
Assignee: Eastman Kodak Co
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Filing: 1962-07-30
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Granted: 1965-04-13
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel B Vaughn
- 👤 Jr Hugh J Hagemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:38
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE WHICH COMPRISES INITIALLY PARTIALLY POLYMERIZING ETHYLENE IN THE PRESENCE OF CARPYLYL PEROXIDE CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 130* TO ABOUT 190*C. AND THEN FURTHER POLYMERIZING SAID ETHYLENE AT A TEMPERATURE, ABOVE THE SAID TEMPERATURE AND WITHIN THE RANGE OF ABOUT 190* TO ABOUT 270*C., THE PRESSURE THROUGHTOUT SAID POLYMERIZATION BEING GREATER THAN ABOUT 500 ATMOSPHERES.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE WHICH COMPRISES INITIALLY PARTIALLY POLYMERIZING ETHYLENE IN THE PRESENCE OF CARPYLYL PEROXIDE CATALYST AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 130* TO ABOUT 190*C. AND THEN FURTHER POLYMERIZING SAID ETHYLENE AT A TEMPERATURE, ABOVE THE SAID TEMPERATURE AND WITHIN THE RANGE OF ABOUT 190* TO ABOUT 270*C., THE PRESSURE THROUGHTOUT SAID POLYMERIZATION BEING GREATER THAN ABOUT 500 ATMOSPHERES.
References Cited (Backward Citations)
US2520959A
Cited
US2964515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |