US2696448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrinkproofed wool and method for producing same
Assignee: Ellis Foster Co
•
Filing: 1949-03-17
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Granted: 1954-12-07
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Expires: 1969-03-17
Abstract
No abstract record available.
Inventors
- 👤 Irving P Hammer
- 👤 John B Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:07
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/59; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2971
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE METHOD OF SHRINKPROOFING WOOL WHILE RETAINING SUBSTANTIALLY NORMAL HAND BY IMPREGNATING WOOL FROM AN AQUEOUS SOLUTION WITH FROM ABOUT 2.5 TO 10% BY WEIGHT ON THE WOOL OF A WATER SOLUBLE POLYAMIDE DERIVATIVE OF A POLYAMIDE WHICH CONTAINS HYDROGEN-BEARING AMIDE NITROGEN ATOMS AND INTRINSIC VISCOSITY ABOVE 0.4, AND DEPOSIT BEING INSUFFICIENT TO MODIFY THE NORMAL HAND OF THE WOOL BUT SUFFICIENT TO GIVE SHRINKPROOFING AND CURING BY HEATING THE PRODUCT AT A TEMPERATURE BELOW THAT OF SUBSTANTIALLY INJURY TO WOOL OR POLYAMIDE DERIVATIVE, IN WHICH THE WATER SOLUBLE POLYAMIDE DERIVATIVE IS AN ACID SALT OF A DISUBSTITUTED -N-ALKOXY METHYL POLYAMIDE THE POLYAMIDE BEING A SYNTHETIC POLYAMIDE HAVING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN.
Claim 2
Independent Claim
119 words
THE METHOD OF SHRINKPROOFING WOOL WHILE RETAINING SUBSTANTIALLY NORMAL HAND BY IMPREGNATING WOOL FROM AN AQUEOUS SOLUTION WITH FROM ABOUT 2.5 TO 10% BY WEIGHT ON THE WOOL OF A WATER SOLUBLE POLYAMIDE DERIVATIVE OF A POLYAMIDE WHICH CONTAINS HYDROGEN-BEARING AMIDE NITROGEN ATOMS AND INTRINSIC VISCOSITY ABOVE 0.4, AND DEPOSIT BEING INSUFFICIENT TO MODIFY THE NORMAL HAND OF THE WOOL BUT SUFFICIENT TO GIVE SHRINKPROOFING AND CURING BY HEATING THE PRODUCT AT A TEMPERATURE BELOW THAT OF SUBSTANTIALLY INJURY TO WOOL OR POLYAMIDE DERIVATIVE, IN WHICH THE WATER SOLUBLE POLYAMIDE DERIVATIVE IS AN ACID SALT OF A DISUBSTITUTED -N-ALKOXY METHYL POLYAMIDE THE POLYAMIDE BEING A SYNTHETIC POLYAMIDE HAVING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE MAIN POLYMER CHAIN.
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) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |