US3137672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact strength of blends of polyethylene and polypropylene
Assignee: Hercules Powder Co
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Filing: 1962-02-01
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Granted: 1964-06-16
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Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Jeremiah P Lehane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:58
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08K; C08K3/00; C08K3/01; C08K3/013; C08L23/04; C08L23/06; C08L23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
THE METHOD OF IMPROVING THE IMPACT STRENGTH OF BLENDS CONTAINING 40 TO 70% BY WEIGHT POLYETHYLENE AND 60 TO 30% STEREOREGULAR POLYPROPYLENE, WHICH COMPRISES INTIMATELY MIXING SAID BLEND WITH FROM ABOUT 0.5 TO ABOUT 3.0% BY WEIGHT OF SAID BLEND OF AN ELASTOMERIC COPOLYMER OF ETHYLENE WITH PROPYLENE AND THEN INTIMATELY BLENDING THE MIXTURE WITH FROM ABOUT 0.5 TO 5.0% BY WEIGHT OF SAID BLEND OF A FINELY DIVIDED INORGANIC SOLID ADDITIVE HAVING A PARTICLE SIZE OF 40 TO 4000 MILLIMICRONS.
Claim 2
Independent Claim
81 words
THE METHOD OF IMPROVING THE IMPACT STRENGTH OF BLENDS CONTAINING 40 TO 70% BY WEIGHT POLYETHYLENE AND 60 TO 30% STEREOREGULAR POLYPROPYLENE, WHICH COMPRISES INTIMATELY MIXING SAID BLEND WITH FROM ABOUT 0.5 TO ABOUT 3.0% BY WEIGHT OF SAID BLEND OF AN ELASTOMERIC COPOLYMER OF ETHYLENE WITH PROPYLENE AND THEN INTIMATELY BLENDING THE MIXTURE WITH FROM ABOUT 0.5 TO 5.0% BY WEIGHT OF SAID BLEND OF A FINELY DIVIDED INORGANIC SOLID ADDITIVE HAVING A PARTICLE SIZE OF 40 TO 4000 MILLIMICRONS.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |