US3018236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation induced ethylene polymerization
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-12-18
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Granted: 1962-01-23
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Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 James E Shewmaker
- 👤 Joseph F Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF LESS THAN 100 P.P.M. OF FREE OXYGEN BY EXPOSURE TO HIGH ENERGY IONIZING RADIATION AT A DOSE RATE ABOVE 100 EQUIVALENT ROENTGENS PER HOUR AT A TEMPERATURE ABOVE 0*C. AND IN THE PRESENCE OF A PROMOTING AMOUNT OF WATER SUFFICIENT TO SATURATE THE ETHYLENE VAPOR AT THE TEMPERATURE USED UP TO A MAXIMUM OF 15 WT. PERCENT.
Claim 2
Dependent Claim
67 words
A PROCESS WHICH COMPRISES POLYMERIZING ETHYLENE IN THE PRESENCE OF LESS THAN 100 P.P.M. OF FREE OXYGEN BY EXPOSURE TO HIGH ENERGY IONIZING RADIATION AT A DOSE RATE ABOVE 100 EQUIVALENT ROENTGENS PER HOUR AT A TEMPERATURE ABOVE 0*C. AND IN THE PRESENCE OF A PROMOTING AMOUNT OF WATER SUFFICIENT TO SATURATE THE ETHYLENE VAPOR AT THE TEMPERATURE USED UP TO A MAXIMUM OF 15 WT. PERCENT.
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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |