Patent US3021567A successfully refreshed from Google Patents.
US3021567A
Expired / Lapsed
US
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Method for molding isotactic polypropylene
Assignee: Montedison SpA
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Filing: 1958-05-13
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Granted: 1962-02-20
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Expires: 1978-05-13
Abstract
No abstract record available.
Inventors
- 👤 Ranalli Franco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:23
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/007; B29C; B29C35/00; B29C35/02; B29C35/0227; B29C35/0233; B29C43/00; B29C43/003; B29C43/006; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2995/00; B29K2995/0037; B29K2995/0041; B29K2995/0088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR MOLDING MACHINABLE FINISHED AND SEMI-FINISHED MASSES COMPRISING HIGHLY ISOTACTIC AND CRYS-
Claim 2
Dependent Claim
14 words
A PROCESS FOR MOLDING MACHINABLE FINISHED AND SEMI-FINISHED MASSES COMPRISING HIGHLY ISOTACTIC AND CRYS-
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |