US2820986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing variable denier filaments
Assignee: EIDP Inc
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Filing: 1956-11-27
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Granted: 1958-01-28
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Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 John S Seney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:46
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
APPARATUS FOR SPINNING ARTIFICIAL FILAMENTS COMPRISING A SPINNERET, A CONDUIT LEADING TO THE SPINNERET, MEANS FOR SUPPLYING FILAMENT-FORMING LIQUID THROUGH THE CONDUIT UNDER PRESSURE, A HOLLOW PISTON SLIDABLY MOUNTED IN THE CONDUIT AS THE ONLY MOVING PART, SAID PISTON BEING OPEN AT EACH END AND THROUGHOUT ITS LENGTH TO PROVIDE A CONTINUOUSLY OPEN PASSAGEWAY THROUGH THE PISTON FOR THE LIQUID, AN ARMATURE AFFIXED TO THE PISTON, FIXED MAGNETIZABLE COILS LOCATED ON EACH SIDE OF THE ARMATURE, AND ELECTRICAL MEANS FOR ALTERNATELY ENERGIZING THE COILS TO OSCILLATE THE ARMATURE AND PISTON AT HIGH FREQUENCY TO TRANSMIT PULSATIONS TO THE LIQUID SUPPLIED TO THE SPINNERET.
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |