US3167604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of fibrous products consisting of polyvinyl alcohol or its derivatives
Assignee: Kanegafuchi Spinning Co Ltd
•
Filing: 1959-12-21
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Granted: 1965-01-26
•
Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Arakawa Makoto
- 👤 Ueda Keizoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:59
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/14; D01F11/00; D01F11/04; D01F11/06; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD FOR THE PREPARATION OF FIBROUS PRODUCTS COMPRISING EXTRUDING AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL CONTAINING BORIC ACID INTO A COAGULATING BATH, THEREAFTER TREATING THE THEREBY EXTRUDED AND COAGULATED MATERIAL WITH A SOLUTION AT A PH OF BETWEEN 2-6 CONTAINING AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF PERIODIC ACID, LEAD TETRA ACETATE AND OSMIUM OXIDE.
Claim 2
Independent Claim
58 words
A METHOD FOR THE PREPARATION OF FIBROUS PRODUCTS COMPRISING EXTRUDING AN AQUEOUS SOLUTION OF POLYVINYL ALCOHOL CONTAINING BORIC ACID INTO A COAGULATING BATH, THEREAFTER TREATING THE THEREBY EXTRUDED AND COAGULATED MATERIAL WITH A SOLUTION AT A PH OF BETWEEN 2-6 CONTAINING AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF PERIODIC ACID, LEAD TETRA ACETATE AND OSMIUM OXIDE.
References Cited (Backward Citations)
US2236061A
Cited
US2749208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |