Patent US3473160A successfully refreshed from Google Patents.
US2883261A
Expired / Lapsed
US
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Process for filtration during melt spinning
Assignee: EIDP Inc
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Filing: 1955-02-02
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Granted: 1959-04-21
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Expires: 1975-02-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur Mcgeorge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:40
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/106; B; B29; B29C; B29C48/00; B29C48/03; B29C48/25; B29C48/36; B29C48/50; B29C48/69
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
THE PROCESS OF FORMING SYNTHETIC FILAMENTARY MATERAIL BY MELT SPINNING COMPRISING THE STEPS OF PUMPING A MOLTEN ORGANIC FILAMENT-FORMING COMPOSITION THROUGH A FIRST STRATUM COMPRISED OF INERT FILTERING PARTICLES, THEN INTO A CONFINED CROSS-FLOW SPACE BETWEEN THE FIRST STRATUM AND A SECOND STRATUM OF INERT FILTERING PARTICLES, THEN THROUGH THE SECOND STRATUM AND INTO A SECOND CROSS-FLOW SPACE BETWEEN SAID SECOND STRATUM AND A SPINNERT, AND THEN THROUGH THE SPINNERT TO FORM SYNTHETIC FILAMENTARY MATERIAL.
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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |