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US3340328A
Expired / Lapsed
US
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Blends of polyethylenes having improved properties
Assignee: ConocoPhillips Co
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Filing: 1962-12-13
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Granted: 1967-09-05
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Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Gordon D Brindell
- 👤 David W Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:01
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L2205/00; C08L2205/02; C08L2205/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A HOMOGENEOUS, EASILY PROCESSABLE POLYETHYLENE COMPOSITION COMPRISING A BLEND OF (A) FROM 15 PERCENT TO 25 PERCENT BY WEIGHT OF A STRAIGHT CHAIN POLYETHYLENE CHARACTERIZED AS HAVING A DENSITY OF FROM 0.95 GRAM/CC. TO 0.96 GRAM/CC. AT 23*C. AND IN HAVING A MELT INDEX IN THE RANGE OF 3 TO 15 GRAMS/10 MINUTES THROUGH A 2.1 MM. ORIFICE AT 190*C. AND UNDER A 2.16 KILOGRAM WEIGHT; AND (B) FROM 85 PERCENT TO 75 PERCENT OF A LINEAR POLYETHYLENE HAVING AN AVERAGE MOLECULAR WEIGHT EXCEEDING 750,000 AND CHARACTERIZED AS HAVING A DENSITY OF BETWEEN APPROXIMATELY 0.925 GRAM/CC. AND 0.935 GRAM/CC. AT 23*C., A MELT INDEX OF ABOUT 0.30 GRAM/10 MINUTES AT 250*C. AND 2,740 P.S.I., AND IN INITIAL MELTING POINT OF BETWEEN 186* C. AND 220*C.
References Cited (Backward Citations)
US3061882A
Cited
US3086958A
Cited
US2983704A
Cited
US3088848A
Cited
US3125548A
Cited
US3179719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |