Patent US3819554A successfully refreshed from Google Patents.
US3819554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily processable essentially rigid vinyl chloride polymer compositions
Assignee: Dow Chemical Co
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Filing: 1973-08-06
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Granted: 1974-06-25
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Expires: 1993-08-06
Abstract
Abstract This invention pertains to essentially rigid vinyl chloride polymer compositions which are easily fabricated into articles such as extrusion blown bottles having exceptional clarity and surface smoothness. More particularly, the invention relates to rigid or essentially rigid thermoplastic compositions comprised essentially of 100 parts by weight of a vinyl chloride polymer in intimate admixture with between about 0.25 and 35 parts by weight of certain chlorinated polyethylenes and between about 0.2 and 0.7 part per 100 parts of a polyethylene having an average molecular weight of between about 1,500 and 15,000.
Inventors
- 👤 R Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/26; C08L23/28; C08L23/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
The composition of claim 1 containing in addition thereto and in combination therewith up to about 25 parts by weight per 100 parts of said polyvinyl chloride of a resinous impact strength modifier which is compatible with said polyvinyl chloride.
Claim 2
Dependent Claim
17 words
A rigid easily processable thermoplastic shaped article having smooth surfaces prepared from the composition of claim 1.
References Cited (Backward Citations)
CA571090A
Cited
CA626534A
Cited
US2802809A
Cited
US3165560A
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US3085082A
Cited
US3291863A
Cited
US3309426A
Cited
BE665013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |