US2792276A
Expired / Lapsed
US
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Treatment of polyacrylonitrile material with hydroxylamine salts
Assignee: Pacific Mills
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Filing: 1954-01-28
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Granted: 1957-05-14
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Expires: 1974-01-28
Abstract
No abstract record available.
Inventors
- 👤 William B Kaupin
- 👤 James P Patsourakos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/58; D06M11/63; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE PROCESS FOR DYEING A POLYACRYLONITRILE PRODUCT WHICH COMPRISES HEATING THE PRODUCT WHILE WET WITH AN AQUEOUS SOLUTION IN WHICH IS INCLUDED 5% TO 50% OF A SALT OF HYDROZLYAMINE, BY WEIGHT ON THE POLYACRYLONITRILE AND AN ALKALI IN AN AMOUNT SUFFICIENT TO ADJUST THE PH OF THE SOLUTION TO BETWEEN 7.0 AND 10.0, AND THEREAFTER DYEING THE PRODUCT.
Claim 2
Dependent Claim
59 words
THE PROCESS FOR DYEING A POLYACRYLONITRILE PRODUCT WHICH COMPRISES HEATING THE PRODUCT WHILE WET WITH AN AQUEOUS SOLUTION IN WHICH IS INCLUDED 5% TO 50% OF A SALT OF HYDROZLYAMINE, BY WEIGHT ON THE POLYACRYLONITRILE AND AN ALKALI IN AN AMOUNT SUFFICIENT TO ADJUST THE PH OF THE SOLUTION TO BETWEEN 7.0 AND 10.0, AND THEREAFTER DYEING THE PRODUCT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |