Patent US2989451A successfully refreshed from Google Patents.
US2989451A
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Irradiated polyethylene
Assignee: General Electric Co
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Filing: 1955-06-16
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Granted: 1961-06-20
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Expires: 1975-06-16
Abstract
No abstract record available.
Inventors
- 👤 Robert J Prochaska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/90; A; A01; A01N; A01N43/00; A01N43/02; A01N43/04; A01N43/06; A01N43/12; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE PROCESS FOR STABILIZING IRRADIATED POLYETHYLENE AGAINST THE OXIDATIVE EFFECTS OF AIR AT TEMPERATURES OF ABOUT 150*C. WHICH COMPRISES INCORPORATING IN THE AFORESAID POLYETHYLENE FROM 0.005 TO 2%, BY WEIGHT, BASED ON THE WEIGHT OF THE POLYETHYLENE, OF SYMMETRICAL DI-BETANAPHTHYL-P-PHENYLENEDIAMINE, AND THEREAFTER SUBJECTING THE POLYETHYLENE TO IRRADIATION WITH HIGH ENERGY ELECTRONS WITHIN THE DOSE RANGE OF FROM 1 TO 50X10**6 ROENTGENS.
Claim 2
Dependent Claim
61 words
THE PROCESS FOR STABILIZING IRRADIATED POLYETHYLENE AGAINST THE OXIDATIVE EFFECTS OF AIR AT TEMPERATURES OF ABOUT 150*C. WHICH COMPRISES INCORPORATING IN THE AFORESAID POLYETHYLENE FROM 0.005 TO 2%, BY WEIGHT, BASED ON THE WEIGHT OF THE POLYETHYLENE, OF SYMMETRICAL DI-BETANAPHTHYL-P-PHENYLENEDIAMINE, AND THEREAFTER SUBJECTING THE POLYETHYLENE TO IRRADIATION WITH HIGH ENERGY ELECTRONS WITHIN THE DOSE RANGE OF FROM 1 TO 50X10**6 ROENTGENS.
References Cited (Backward Citations)
US2727879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |