Patent US3320188A successfully refreshed from Google Patents.
US3320188A
Expired / Lapsed
US
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Process for preparing multicellular bodies
Assignee: Stamicarbon BV
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Filing: 1962-12-03
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Granted: 1967-05-16
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Dijkema Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:03
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08J9/149; C08J9/0061; C08J2323/00; C08J2323/02; C08J2491/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR PREPARING MULTICELLULAR SYNTHETIC THERMOPLASTIC BODIES COMPRISING FORMING A MELT OF A SYNTHETIC THERMOPLASTIC POLYMER CONTAINING A BLOWING AGENT AND A WAX, IN A FINELY DIVIDED STATE, HAVING A HIGHER SOLIDIFICATION POINT THAN THE THERMOPLASTIC POLYMER; AND INTRODUCING THE MELT INTO A ZONE OF LOWER PRESSURE TO SOLIDIFY AND EXPAND SAID POLYMER AND FORM A MULTICELLULAR BODY.
Claim 2
Dependent Claim
59 words
A PROCESS FOR PREPARING MULTICELLULAR SYNTHETIC THERMOPLASTIC BODIES COMPRISING FORMING A MELT OF A SYNTHETIC THERMOPLASTIC POLYMER CONTAINING A BLOWING AGENT AND A WAX, IN A FINELY DIVIDED STATE, HAVING A HIGHER SOLIDIFICATION POINT THAN THE THERMOPLASTIC POLYMER; AND INTRODUCING THE MELT INTO A ZONE OF LOWER PRESSURE TO SOLIDIFY AND EXPAND SAID POLYMER AND FORM A MULTICELLULAR BODY.
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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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |