US2988802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for spinning polyvinyl alcohol fibers and product
Assignee: Kurashiki Rayon Co Ltd
•
Filing: 1953-02-10
•
Granted: 1961-06-20
•
Expires: 1973-02-10
Abstract
No abstract record available.
Inventors
- 👤 Akaboshi Michijiro
- 👤 Tomonari Tatsuko
- 👤 Tomonari Natsuko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:16
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/12; D01D5/14; D01D5/06; D01F; D01F6/00; D01F6/02; D01F6/14; Y; Y10; Y10S; Y10S260/00; Y10S260/23; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
AN APPARATUS FOR UP-SPINNING POLYVINYL ALCOHOL FIBERS OF FILAMENTS COMPRISING A CHAMBER FOR A COAGULATING LIQUID, FEEDING MEANS AT THE BOTTOM OF SAID CHAMBER PROVIDED WITH A PLURALITY OF APERTURES FOR INJECTING COAGULATING LIQUID UPWARDLY IN THE FORM OF A SPRAY OF FINE PARALLEL STREAMS INTO SAID CHAMBER, A SPINNERET ARRANGED TO DELIVERY A POLYVINYL ALCOHOL SOLUTION INTO SAID CHAMBER INTO THE CENTER OF SAID INJECTED COAGULATING LIQUID, A SLIDABLE CYLINDRICAL TUBE EXTENDING UPWARDLY FROM SAID CHAMBER AND OPENING INTO SAID CHAMBER BY A FUNNEL OF GRADUALLY INCREASING DIAMETER, MEANS TO HOLD SAID CYLINDRICAL TUBE SLIDABLY AT A PREDETERMINED DISTANCE FROM SAID SPINNERET, AND A GODET ROLLER ABOVE SAID TUBE TO WITHDRAW THE FILAMENTS FORMED IN SAID TUBE.
Claim 2
Independent Claim
118 words
AN APPARATUS FOR UP-SPINNING POLYVINYL ALCOHOL FIBERS OF FILAMENTS COMPRISING A CHAMBER FOR A COAGULATING LIQUID, FEEDING MEANS AT THE BOTTOM OF SAID CHAMBER PROVIDED WITH A PLURALITY OF APERTURES FOR INJECTING COAGULATING LIQUID UPWARDLY IN THE FORM OF A SPRAY OF FINE PARALLEL STREAMS INTO SAID CHAMBER, A SPINNERET ARRANGED TO DELIVERY A POLYVINYL ALCOHOL SOLUTION INTO SAID CHAMBER INTO THE CENTER OF SAID INJECTED COAGULATING LIQUID, A SLIDABLE CYLINDRICAL TUBE EXTENDING UPWARDLY FROM SAID CHAMBER AND OPENING INTO SAID CHAMBER BY A FUNNEL OF GRADUALLY INCREASING DIAMETER, MEANS TO HOLD SAID CYLINDRICAL TUBE SLIDABLY AT A PREDETERMINED DISTANCE FROM SAID SPINNERET, AND A GODET ROLLER ABOVE SAID TUBE TO WITHDRAW THE FILAMENTS FORMED IN SAID TUBE.
Claim 3
Dependent Claim
59 words
A TEXTILE FIBER CONSISTING ESSENTIALLY OF POLYVINYL ALCOHOL AND PRESENTING A DISTINCT CORE AND SKIN PART, THE CORE PART MAKING UP ABOUT 40 TO 75 PERCENT BY WEIGHT OF THE FIBER AND CONSISTING OF A SUBSTANTIALLY UNORIENTED POLYVINYL ALCOHOL STRUCTURE, THE SKIN PART MAKING UP THE REMAINDER OF THE FIBER AND SHOWING IN AN X-RAY DIAGRAM A CRYSTALLINE STRUCTURE.
Claim 4
Dependent Claim
59 words
A TEXTILE FIBER CONSISTING ESSENTIALLY OF POLYVINYL ALCOHOL AND PRESENTING A DISTINCT CORE AND SKIN PART, THE CORE PART MAKING UP ABOUT 40 TO 75 PERCENT BY WEIGHT OF THE FIBER AND CONSISTING OF A SUBSTANTIALLY UNORIENTED POLYVINYL ALCOHOL STRUCTURE, THE SKIN PART MAKING UP THE REMAINDER OF THE FIBER AND SHOWING IN AN X-RAY DIAGRAM A CRYSTALLINE STRUCTURE.
References Cited (Backward Citations)
US827434A
Cited
US838758A
Cited
US2190265A
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US2169250A
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US2255594A
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US2642333A
Cited
US2610360A
Cited
US2711559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |