Patent US3231636A successfully refreshed from Google Patents.
US3231636A
Expired / Lapsed
US
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High shear strength blends of high and low density polyethylene
Assignee: Union Carbide Corp
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Filing: 1958-03-20
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Granted: 1966-01-25
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Expires: 1978-03-20
Abstract
No abstract record available.
Inventors
- 👤 John A Snyder
- 👤 Harold C Vakos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:46
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L2205/00; C08L2205/02; C08L2205/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A COMPOSITION POSSESSING IMPROVED SHEAR STRENGTH AND RESISTANCE TO THERMAL EMBRITTLEMENT COMPRISING 50 TO 85 PARTS BY WEIGHT OF A POLYETHYLENE RESIN HAVING A SPECIFIC GRAVITY ABOVE 0.945 AND A MELT INDEX BETWEEN ABOUT 0.02 AND 8.0 AND 50 TO 15 PARTS BY WEIGHT OF A POLYETHYLENE RESIN HAVING A SPECIFIC GRAVITY BETWEEN ABOUT 0.915 AND 0.925 AND A MELT INDEX BETWEEN ABOUT 0.02 TO 25.0.
Claim 2
Dependent Claim
66 words
A COMPOSITION POSSESSING IMPROVED SHEAR STRENGTH AND RESISTANCE TO THERMAL EMBRITTLEMENT COMPRISING 50 TO 85 PARTS BY WEIGHT OF A POLYETHYLENE RESIN HAVING A SPECIFIC GRAVITY ABOVE 0.945 AND A MELT INDEX BETWEEN ABOUT 0.02 AND 8.0 AND 50 TO 15 PARTS BY WEIGHT OF A POLYETHYLENE RESIN HAVING A SPECIFIC GRAVITY BETWEEN ABOUT 0.915 AND 0.925 AND A MELT INDEX BETWEEN ABOUT 0.02 TO 25.0.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |