US3179720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene blends
Assignee: Hercules Powder Co
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Filing: 1962-10-22
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Granted: 1965-04-20
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Expires: 1982-10-22
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Hillmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:23
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A BLEND CONSISTING ESSENTIALLY OF TWO DIFFERENT TRANSITION METAL-CATALYZED POLYETHYLENES, EACH OF SAID POLYETHYLENES HAVING A DENSITY OF AT LEAST ABOUT 0.96, ONE OF SAID POLYETHYLENES HAVING A MELT INDEX (I2, 190 C.) OF AT LEAST ABOUT 3.0 AND THE OTHER HAVING A MELT INDEX (I2, 190*C.) BELOW ABOUT 0.3, EACH OF SAID POLYETHYLENES BEING PRESENT IN THE AMOUNT OF AT LEAST ABOUT 25% BY WEIGHT OF THE TOTAL BLEND, AND THE BLEND HAVING A MELT INDEX (I2, 190*C.) BETWEEN ABOUT 0.3 AND 1.5.
Claim 2
Dependent Claim
84 words
A BLEND CONSISTING ESSENTIALLY OF TWO DIFFERENT TRANSITION METAL-CATALYZED POLYETHYLENES, EACH OF SAID POLYETHYLENES HAVING A DENSITY OF AT LEAST ABOUT 0.96, ONE OF SAID POLYETHYLENES HAVING A MELT INDEX (I2, 190 C.) OF AT LEAST ABOUT 3.0 AND THE OTHER HAVING A MELT INDEX (I2, 190*C.) BELOW ABOUT 0.3, EACH OF SAID POLYETHYLENES BEING PRESENT IN THE AMOUNT OF AT LEAST ABOUT 25% BY WEIGHT OF THE TOTAL BLEND, AND THE BLEND HAVING A MELT INDEX (I2, 190*C.) BETWEEN ABOUT 0.3 AND 1.5.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |