Patent US3651454A successfully refreshed from Google Patents.
US3962205A
Expired / Lapsed
US
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Polymer materials
Assignee: National Research Development Corp UK
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Filing: 1974-03-06
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Granted: 1976-06-08
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Expires: 1994-03-06
Abstract
Abstract An oriented high density polyethylene polymer material having a weight average molecular weight of less than 200,000, a number average molecular weight of less than 20,000, a ratio of weight average molecular weight M w to number average molecular weight M n such that for M n > 10 4 , M w /M n < 8 and for M n < 10 4 , M w /M n < 20, and a Young's modulus greater than 3 × 10 10 N/m 2 .
Inventors
- 👤 Ian MacMillan Ward
- 👤 Giancarlo Capaccio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:26
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/221; B; B29; B29C; B29C55/00; B29C55/02; C; C08; C08J; C08J7/00; C08J7/08; D01; D01F; D01F6/00; D01F6/02; D01F6/04; B29K; B29K2023/00; B29K2023/04; B29K2023/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
An oriented high density polyethylene polymer material having a density of from 0.85 to 1.0 gms/cm 3 , a weight average molecular weight of less than 200,000, a number average molecular weight of less than 20,000, a ratio of weight average molecular weight M w to number average molecular weight M w such that for M n >10 4 , M w /M n <8 and for M n <10 4 , M w /M n <20, and a Young's modulus as hereinbefore defined greater than 3 × 10 10 N/m 2 .
Claim 2
Dependent Claim
93 words
An oriented high density polyethylene polymer material having a density of from 0.85 to 1.0 gms/cm 3 , a weight average molecular weight of less than 200,000, a number average molecular weight of less than 20,000, a ratio of weight average molecular weight M w to number average molecular weight M w such that for M n >10 4 , M w /M n <8 and for M n <10 4 , M w /M n <20, and a Young's modulus as hereinbefore defined greater than 3 × 10 10 N/m 2 .
Claim 3
Dependent Claim
19 words
A polyethylene polymer material according to claim 1, having a weight average molecular weight of from 50,000 to 150,000.
Claim 4
Dependent Claim
19 words
A polyethylene polymer material according to claim 1, having a number average molecular weight of from 5,000 to 15,000.
Claim 5
Dependent Claim
38 words
A polyethylene polymer material according to claim 1, having a molecular weight distribution such that for M n >10 4 , M w /M n <6, and for M n <10 4 , M w /M n <15.
Claim 6
Dependent Claim
25 words
A polyethylene polymer material according to claim 1 having a weight loss in fuming nitric acid of less than 5% after 10 days at 60°C.
Claim 7
Dependent Claim
12 words
A polyethylene polymer material according to claim 1 that is uniaxially oriented.
Claim 8
Dependent Claim
15 words
A polyethylene polymer material according to claim 1 that is a fibre or a film.
Claim 9
Dependent Claim
13 words
A polyethylene polymer material according to claim 1 that is a continuous filament.
Claim 10
Dependent Claim
26 words
A polyethylene polymer material according to claim 1 having a Young's modulus in the range of from 5 to 7 × 10 10 N/m 2 .
References Cited (Backward Citations)
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US3558580A
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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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |