Patent US3273956A successfully refreshed from Google Patents.
US3273956A
Expired / Lapsed
US
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Method of treating acrylonitrile synthetic fibers
Assignee: Wyeth Holdings LLC
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Filing: 1962-08-08
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Granted: 1966-09-20
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Expires: 1982-08-08
Abstract
No abstract record available.
Inventors
- 👤 Fujita Yoshimasa
- 👤 Tsutsui Nobuhiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:36
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67341; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR RETARDING THE DYEABILITY OF AN ACRYLONITRILE POLYMER FIBER CONTAINING ACID GROUPS AND WHICH IS HIGHLY SUBSTANTIVE TO CATIONIC DYES, SAID PROCESS COMPRISING IMMERSING SUCH FIBER IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF A MULTIVALENT METALLIC ION SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, CALCIUM, BARIUM, CHROMIUM, ZINC, COBALT, NICKEL, ALUMINUM, TIN, AND LEAD WITH AN ANION SELECTED FROM THE GROUP CONSISTING OF NITRATES, SULFATES, CHLORIDES, AND ORGANIC ACID RESIDUES PRIOR TO EXPOSURE OF SUCH FIBER TO CATIONIC DYES.
Claim 2
Dependent Claim
83 words
A PROCESS FOR RETARDING THE DYEABILITY OF AN ACRYLONITRILE POLYMER FIBER CONTAINING ACID GROUPS AND WHICH IS HIGHLY SUBSTANTIVE TO CATIONIC DYES, SAID PROCESS COMPRISING IMMERSING SUCH FIBER IN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SALT OF A MULTIVALENT METALLIC ION SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, CALCIUM, BARIUM, CHROMIUM, ZINC, COBALT, NICKEL, ALUMINUM, TIN, AND LEAD WITH AN ANION SELECTED FROM THE GROUP CONSISTING OF NITRATES, SULFATES, CHLORIDES, AND ORGANIC ACID RESIDUES PRIOR TO EXPOSURE OF SUCH FIBER TO CATIONIC DYES.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |