US4769433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength polyolefins
Assignee: EIDP Inc
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Filing: 1986-08-29
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Granted: 1988-09-06
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Expires: 2006-08-29
Abstract
Abstract High strength, substantially linear, highly crystalline, high molecular weight-polyolefin shaped structure having a tenacity of greater than 15 g/den and an initial modulus of greater than 500 g/den by drawing never-processed polyolefin at a temperature of 60° C. to 145° C.; and processes for making never-processed polyolefin and such shaped structures.
Inventors
- 👤 Henri D. Chanzy
- 👤 Bruno Rotzinger
- 👤 Paul Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:07
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B29; B29C; B29C48/00; B29C48/022; B29C67/00; B29C67/24; C08F; C08F2/00; C08F2/12; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; D; D01; D01F; D01F6/00; D01F6/02; D01F6/04; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0658; B29K2023/0683; B29K2995/00; B29K2995/0037; B29K2995/0088; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
60 words
Process for producing shaped structures having a tenacity of greater than 15 g/den and an initial modulus of greater than 500 g/den, said process comprising drawing at 60°-145° C. a substantially linear, highly cyrstalline, neither melted nor dissolved polyolefin having a molecular weight greater than 1,000,000 and selected from polyethylene, polypropylene and copolymers of ethylene and 0.1-2.0 mol % propylene.
Claim 2
Dependent Claim
60 words
Process for producing shaped structures having a tenacity of greater than 15 g/den and an initial modulus of greater than 500 g/den, said process comprising drawing at 60°-145° C. a substantially linear, highly cyrstalline, neither melted nor dissolved polyolefin having a molecular weight greater than 1,000,000 and selected from polyethylene, polypropylene and copolymers of ethylene and 0.1-2.0 mol % propylene.
Claim 3
Dependent Claim
9 words
Process of claim 1 wherein the polyolefin is polyethylene.
Claim 4
Dependent Claim
15 words
Process of claim 1 wherein the shaped structure is a film, tape, filament or fiber.
Claim 5
Dependent Claim
12 words
Process of claim 1 wherein the molecular weight is at least 2,000,000.
Claim 6
Dependent Claim
12 words
Process of claim 4 wherein the molecular weight is at least 5,000,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |