US3686388A
Expired / Lapsed
US
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A method for preparing dimensionally stable articles of polybutene-1
Assignee: Huels AG
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Filing: 1968-12-09
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Granted: 1972-08-22
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Expires: 1988-12-09
Abstract
Abstract Dimensionally stable articles of poly-1-butene making at least 70% isotactic structure formed by: A. PREPARING ISOTACTIC POLY-1-BUTENE FROM 1-BUTENE; B. FORMING MOLTEN POLY-1-BUTENE INTO SEMI-FINISHED PRODUCTS AT ABOUT 200-280* C and permitting the semi-finished products to cool; C. COLD FORMING THE SEMI-FINISHED PRODUCTS AT BELOW 80* C into final shapes within thirty minutes of cooling; and D. STORING THE SHAPED ARTICLES ABOUT 0.5 TO 12 HOURS WHILE AVOIDING THE EFFECTS OF LARGER FORCES ON THE ARTICLES.
Inventors
- 👤 Gunter Beckmann
- 👤 Hans-Ulrich Finkmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:25
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; B; B29; B29C; B29C67/00; B29C67/0029; B29C67/24; B29K; B29K2023/00; B29K2023/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
The process of claim 1, wherein said semi-finished products are cooled to a temperature of about 20* - 40* C. prior to said cold forming.
Claim 2
Dependent Claim
19 words
The process of claim 1, wherein said cold forming is carried out within 0 to 5 minutes of cooling.
Claim 3
Dependent Claim
18 words
A process as defined by claim 1 wherein step (c) is conducted for at least about 8 hours.
Claim 4
Dependent Claim
15 words
A process as defined by claim 1 wherein step (c) is conducted at ambient temperature.
Claim 5
Dependent Claim
15 words
A process as defined by claim 4 wherein step (c) is conducted at ambient temperature.
Claim 6
Dependent Claim
15 words
A process as defined by claim 1 wherein said cold forming is conducted by bending.
Claim 7
Dependent Claim
15 words
A process as defined by claim 1 wherein said cold forming is conducted by twisting.
Claim 8
Dependent Claim
15 words
A process as defined by claim 1 wherein said cold forming is conducted by folding.
Claim 9
Dependent Claim
15 words
A process as defined by claim 1 wherein said cold forming is conducted by embossing.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |