Patent US4281070A successfully refreshed from Google Patents.
US4281070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt processable UHMWPE
Assignee: Polymer Corp
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Filing: 1980-01-07
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Granted: 1981-07-28
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Expires: 2000-01-07
Abstract
Abstract Ultrahigh molecular weight polyethylene molding powders with improved melt characteristics are disclosed that can be processed with conventional melt forming equipment such as screw extruders and injection molding machines. The molding powders are comprised of from 70 to 95 weight percent ultrahigh molecular weight polyethylene, from 5 to 30 weight percent of an intermediate molecular weight polyethylene and from 0.1 to 10 percent of a finely divided nucleating agent.
Inventors
- 👤 Howard A. Scheetz
- 👤 Richard C. Gilles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K3/00; C08K3/01; C08K5/0083; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08K3/34; C08K3/36; C08L2207/00; C08L2207/06; C08L2207/068; Y; Y10; Y10S; Y10S524/00; Y10S524/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
An ultrahigh molecular weight polyethylene molding composition comprised of 70 to 95 percent by weight ultrahigh molecular weight polyethylene, from 5 to 30 percent by weight of an intermediate molecular weight polyethylene having a molecular weight in a range from about 400,000 to 600,000 and from 0.1 to 10 percent by weight of a pyrogenic silica nucleating agent.
Claim 2
Dependent Claim
58 words
An ultrahigh molecular weight polyethylene molding composition comprised of 70 to 95 percent by weight ultrahigh molecular weight polyethylene, from 5 to 30 percent by weight of an intermediate molecular weight polyethylene having a molecular weight in a range from about 400,000 to 600,000 and from 0.1 to 10 percent by weight of a pyrogenic silica nucleating agent.
References Cited (Backward Citations)
US3929939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |