Patent US2575838A successfully refreshed from Google Patents.
US2575838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of crimping proteinaceous fibers
Assignee: ALEXANDER SMITH Inc
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Filing: 1948-11-30
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Granted: 1951-11-20
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Expires: 1968-11-30
Abstract
No abstract record available.
Inventors
- 👤 Leo W Rainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:32
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE METHOD OF IMPARTING AN ARTIFICIAL CRIMP TO PROTEINACEOUS FIBERS WHICH COMPRISES FEEDING SAID FIBERS INTO A CRIMPING ZONE MAINTAINED FULL OF A MASS OF SAID FIBERS AND HELD UNDER A PRESSURE ADAPTED TO CAUSE THE FIBERS TO BE FOLDED OVER AND CRIMPED AS THEY ARE FORCED INTO SAID MASS OF FIBERS, HOLDING THE MASS OF CRIMPED FIBERS UNDER PRESSURE IN A SETTING ZONE, MAINTAINING SETTING CONDITIONS OF TEMPERATURE AND MOISTURE CONTENT IN SAID SETTING ZONE, DISCHARGING THE CRIMPED FIBERS FROM SAID SETTING ZONE, AND PASSING THE CRIMPED FIBERS THROUGH A RELAXING BATH AT A TEMPERATURE AND RATE TO AT LEAST PARTIALLY RELAX THE INTERNAL STRESS PRODUCED BY CRIMPING AND TO IMPROVE THE SPINNING CHARACTERISTICS OF SAID FIBERS.
Claim 2
Independent Claim
118 words
THE METHOD OF IMPARTING AN ARTIFICIAL CRIMP TO PROTEINACEOUS FIBERS WHICH COMPRISES FEEDING SAID FIBERS INTO A CRIMPING ZONE MAINTAINED FULL OF A MASS OF SAID FIBERS AND HELD UNDER A PRESSURE ADAPTED TO CAUSE THE FIBERS TO BE FOLDED OVER AND CRIMPED AS THEY ARE FORCED INTO SAID MASS OF FIBERS, HOLDING THE MASS OF CRIMPED FIBERS UNDER PRESSURE IN A SETTING ZONE, MAINTAINING SETTING CONDITIONS OF TEMPERATURE AND MOISTURE CONTENT IN SAID SETTING ZONE, DISCHARGING THE CRIMPED FIBERS FROM SAID SETTING ZONE, AND PASSING THE CRIMPED FIBERS THROUGH A RELAXING BATH AT A TEMPERATURE AND RATE TO AT LEAST PARTIALLY RELAX THE INTERNAL STRESS PRODUCED BY CRIMPING AND TO IMPROVE THE SPINNING CHARACTERISTICS OF SAID FIBERS.
References Cited (Backward Citations)
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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) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |