Patent US3074104A successfully refreshed from Google Patents.
US3074104A
Expired / Lapsed
US
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Spinning apparatus
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-05-21
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Granted: 1963-01-22
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Stanley William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:25
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN A MELT SPINNING APPARATUS, A BED FOR FILTERING MOLTEN THERMOPLASTIC POLYMER PASSED LONGITUDINALLY THERETHROUGH, SAID BED COMPRISING: TWO ADJACENT CONTACTING LAYERS OF GRADED GRANULAR MATERIAL DISPOSED TRANSVERSELY TO THE FLOW OF POLYMER; ONE OF SAID LAYERS INCLUDING AT LEAST ONE MOLDED SHAPE HAVING A SURFACE OF IRREGULAR CONFIGURATION, PORTIONS OF WHICH EXTEND OUT OF THE TRANSVERSE PLANE DEFINED BY THE REMAINDER OF SAID ONE LAYER; SAID SURFACE BEING IN CONTACT WITH THE OTHER LAYER AND THEREBY DEFINING THEREWITH AN IRREGULAR INTERFACE OF SUBSTANTIALLY GREATER AREA THAN AN INTERFACE FORMED BY LAYERS HAVING THEIR CONTACTING SURFACES LYING IN A SINGLE PLANE; THE GRANULAR MATERIAL OF SAID SHAPE BEING HELD TOGETHER BY A BINDING AGENT WHICH IS READILY REMOVABLE BEFORE MELT SPINNING.
Claim 2
Dependent Claim
121 words
IN A MELT SPINNING APPARATUS, A BED FOR FILTERING MOLTEN THERMOPLASTIC POLYMER PASSED LONGITUDINALLY THERETHROUGH, SAID BED COMPRISING: TWO ADJACENT CONTACTING LAYERS OF GRADED GRANULAR MATERIAL DISPOSED TRANSVERSELY TO THE FLOW OF POLYMER; ONE OF SAID LAYERS INCLUDING AT LEAST ONE MOLDED SHAPE HAVING A SURFACE OF IRREGULAR CONFIGURATION, PORTIONS OF WHICH EXTEND OUT OF THE TRANSVERSE PLANE DEFINED BY THE REMAINDER OF SAID ONE LAYER; SAID SURFACE BEING IN CONTACT WITH THE OTHER LAYER AND THEREBY DEFINING THEREWITH AN IRREGULAR INTERFACE OF SUBSTANTIALLY GREATER AREA THAN AN INTERFACE FORMED BY LAYERS HAVING THEIR CONTACTING SURFACES LYING IN A SINGLE PLANE; THE GRANULAR MATERIAL OF SAID SHAPE BEING HELD TOGETHER BY A BINDING AGENT WHICH IS READILY REMOVABLE BEFORE MELT SPINNING.
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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) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |