Patent US2861865A successfully refreshed from Google Patents.
US2861865A
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Method of roughening and dulling polyethylene terephthalate fibers
Assignee: Glanzstoff AG
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Filing: 1954-08-02
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Granted: 1958-11-25
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Expires: 1974-08-02
Abstract
No abstract record available.
Inventors
- 👤 Siggel Erhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:53
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/192; D01; D01D; D01D10/00; D01D10/02; D01F; D01F6/00; D01F6/58; D01F6/62; D06M13/02; D06M13/12; D06M13/127; D06M13/165; D06M13/188; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
METHOD OF ROUGHENING AND DULLING POLYETHYLENEENE TEREPHTHALATE FIBERS WHICH COMPRISES SPINNING A MOLTEN MASS OF SOLVENT-CONTAINING POLYETHYLEN TEREPHTHALATE INTO A FIBER WHICH RETAINS A PORTION OF SAID SOLVENT, THE SOLVENT IN SAID MOLTEN MASS BEING PRESENT IN AN AMOUNT OF FROM 5% TO 30%, PASSING THE SPUN FIBER THROUGH A BATH WHEREIN THE AFORESAID SOLVENT IS EXTRACTED FROM A SURFACE LAYER OF THE FIBER, STRETCHING THE SO TREATED FIBER, AND SUBJECTING THE STRETCHED FIBER TO THE ACTION OF SUPERHEATED STEAM TO EXPEL THE RESIDUAL SOLVENT.
Claim 2
Dependent Claim
85 words
METHOD OF ROUGHENING AND DULLING POLYETHYLENEENE TEREPHTHALATE FIBERS WHICH COMPRISES SPINNING A MOLTEN MASS OF SOLVENT-CONTAINING POLYETHYLEN TEREPHTHALATE INTO A FIBER WHICH RETAINS A PORTION OF SAID SOLVENT, THE SOLVENT IN SAID MOLTEN MASS BEING PRESENT IN AN AMOUNT OF FROM 5% TO 30%, PASSING THE SPUN FIBER THROUGH A BATH WHEREIN THE AFORESAID SOLVENT IS EXTRACTED FROM A SURFACE LAYER OF THE FIBER, STRETCHING THE SO TREATED FIBER, AND SUBJECTING THE STRETCHED FIBER TO THE ACTION OF SUPERHEATED STEAM TO EXPEL THE RESIDUAL SOLVENT.
References Cited (Backward Citations)
US2214442A
Cited
US2157117A
Cited
US2404727A
Cited
GB610183A
Cited
GB603840A
Cited
US2556295A
Cited
US2558730A
Cited
US2604689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-24 | 1962-05-26 | 1962-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-24 | 1966-05-26 | 1966-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-24 | 1970-05-26 | 1970-11-25 | $7700.00 | Window Closed / Lapsed |