US3256367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypropylene compositions having improved impact strength containing polyethylene and ethylene-propylene copolymer
Assignee: Union Carbide Corp
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Filing: 1962-08-14
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Granted: 1966-06-14
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jr William M Jayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:27
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L2205/00; C08L2205/03; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L2310/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
POLYPROPYLENE COMPOSITION HAVING HIGH IMPACT STRENGTH WHICH COMPRISES FROM ABOUT 50 TO ABOUT 96 PERCENT BY WEIGHT OF A NORMALLY SOLID POLYPROPYLENE HAVING A MELT FLOW OF LESS THAN ABOUT 12 G./10 MIN., FROM ABOUT 2 TO ABOUT 25 PERCENT BY WEIGHT OF POLYETHYLENE HAVING A DENSITY OF AT LEAST ABOUT 0.91 AND A MELT INDEX OF LESS THAN ABOUT 100 DG./MIN., AND FROM ABOUT 2 TO ABOUT 25 PERCENT BY WEIGHT OF AMORPHOUS ETHYLENE/PROPYLENE COPOLYMER CONTAINING FROM ABOUT 5 TO ABOUT 75 PERCENT BY WEIGHT OF COMBINED ETHYLENE AND FROM ABOUT 25 TO ABOUT 95 PERCENT BY WEIGHT OF COMBINED PROPYLENE AND HAVING A MELT INDEX OF LESS THAN ABOUT 1000 DG./MIN.
Claim 2
Dependent Claim
113 words
POLYPROPYLENE COMPOSITION HAVING HIGH IMPACT STRENGTH WHICH COMPRISES FROM ABOUT 50 TO ABOUT 96 PERCENT BY WEIGHT OF A NORMALLY SOLID POLYPROPYLENE HAVING A MELT FLOW OF LESS THAN ABOUT 12 G./10 MIN., FROM ABOUT 2 TO ABOUT 25 PERCENT BY WEIGHT OF POLYETHYLENE HAVING A DENSITY OF AT LEAST ABOUT 0.91 AND A MELT INDEX OF LESS THAN ABOUT 100 DG./MIN., AND FROM ABOUT 2 TO ABOUT 25 PERCENT BY WEIGHT OF AMORPHOUS ETHYLENE/PROPYLENE COPOLYMER CONTAINING FROM ABOUT 5 TO ABOUT 75 PERCENT BY WEIGHT OF COMBINED ETHYLENE AND FROM ABOUT 25 TO ABOUT 95 PERCENT BY WEIGHT OF COMBINED PROPYLENE AND HAVING A MELT INDEX OF LESS THAN ABOUT 1000 DG./MIN.
References Cited (Backward Citations)
US2993028A
Cited
US3036987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |