US2956306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extrusion of polyethylene
Assignee: EIDP Inc
•
Filing: 1954-06-21
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Granted: 1960-10-18
•
Expires: 1974-06-21
Abstract
No abstract record available.
Inventors
- 👤 Conwell Yeates
- 👤 Jr William B Happoldt
- 👤 Lewis Ernest Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/30; B29C48/305; B29C48/31; B29C48/313; D01F6/00; D01F6/02; D01F6/04; B29C48/001; B29C48/0018; B29C48/07; B29C48/08; Y; Y10; Y10S; Y10S264/00; Y10S264/73; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS FOR THE EXTRUSION OF SOLID POLYMERS OF ETHYLENE AS ELONGATED SHAPES AND FOR STRETCHING THE FORMING SHAPE, THE STEPS WHICH COMPRISE MELTING A NORMALLY SOLID POLYMER OF ETHYLENE, CONTAINING FROM 0.0005% TO 0.02% BY WEIGHT OF 2,6-DI-T-BUTYL-4-METHYL PHENOL, EXTRUDING THE MELT INTO AN ELONGATED SHAPE AND THEREAFTER, WHILE THE POLYMER REMAINS PLASTIC, STRETCHING THE SHAPE TO FROM 1/2 TO 1/100 OF ITS ORIGINAL THICKNESS.
Claim 2
Dependent Claim
67 words
IN A PROCESS FOR THE EXTRUSION OF SOLID POLYMERS OF ETHYLENE AS ELONGATED SHAPES AND FOR STRETCHING THE FORMING SHAPE, THE STEPS WHICH COMPRISE MELTING A NORMALLY SOLID POLYMER OF ETHYLENE, CONTAINING FROM 0.0005% TO 0.02% BY WEIGHT OF 2,6-DI-T-BUTYL-4-METHYL PHENOL, EXTRUDING THE MELT INTO AN ELONGATED SHAPE AND THEREAFTER, WHILE THE POLYMER REMAINS PLASTIC, STRETCHING THE SHAPE TO FROM 1/2 TO 1/100 OF ITS ORIGINAL THICKNESS.
References Cited (Backward Citations)
US2360864A
Cited
US2471887A
Cited
US2566537A
Cited
US2625491A
Cited
GB701468A
Cited
US2698463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |