US3340571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinneret for making hollow filaments
Assignee: Celanese Corp
•
Filing: 1965-09-27
•
Granted: 1967-09-12
•
Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Bishop Clarence Edward
- 👤 Young Paul Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A SPINNERETTE HAVING FORMED THEREIN AT LEAST ONE JET OPENING THE BASIC SHAPE OF WHICH IS A SEGMENT OF A CIRCLE, THE STRAIGHT BOUNDARY WALL OF SAID JET OPENING BEING PROVIDED WITH A SMALL PROTUBERANCE EXTENDING TOWARD THE OPPOSED CURVED BOUNDARY WALL OF SAID JET OPENING.
Claim 2
Dependent Claim
46 words
A SPINNERETTE HAVING FORMED THEREIN AT LEAST ONE JET OPENING THE BASIC SHAPE OF WHICH IS A SEGMENT OF A CIRCLE, THE STRAIGHT BOUNDARY WALL OF SAID JET OPENING BEING PROVIDED WITH A SMALL PROTUBERANCE EXTENDING TOWARD THE OPPOSED CURVED BOUNDARY WALL OF SAID JET OPENING.
References Cited (Backward Citations)
GB253209A
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GB545118A
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US2838364A
Cited
US2945739A
Cited
GB843179A
Cited
GB891464A
Cited
FR1278970A
Cited
US3178770A
Cited
US3187607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |