Patent US2902336A successfully refreshed from Google Patents.
US2902336A
Expired / Lapsed
US
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Process for the production of amylose articles by extrusion of aqueous sodium hydroxide solution thereof into concentrated aqueous ammonium sulphate solution
Assignee: Cooperative Avebe UA
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Filing: 1958-10-20
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Granted: 1959-09-01
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Expires: 1978-10-20
Abstract
No abstract record available.
Inventors
- 👤 Hiemstra Pieter
- 👤 Muetgeert Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:23
CPC Classifications
D; D01; D01F; D01F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
IN A PROCESS FOR THE PRODUCTION OF ARTICLES OF MANUFACTURE SUCH AS FIBRES AND FILMS FROM AMYLOSE, THE STEP OF DISSOLVING AMYLOSE IN AN AQUEOUS SODIUM HYDROXIDE SOLUTION AND EXTRUDING THIS SOLUTION INTO A CONCENTRATED AQUEOUS AMMONIUM SULPHATE SOLUTION.
Claim 2
Dependent Claim
39 words
IN A PROCESS FOR THE PRODUCTION OF ARTICLES OF MANUFACTURE SUCH AS FIBRES AND FILMS FROM AMYLOSE, THE STEP OF DISSOLVING AMYLOSE IN AN AQUEOUS SODIUM HYDROXIDE SOLUTION AND EXTRUDING THIS SOLUTION INTO A CONCENTRATED AQUEOUS AMMONIUM SULPHATE SOLUTION.
References Cited (Backward Citations)
US2137171A
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US2570449A
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US2495767A
Cited
US2608723A
Cited
US2853414A
Cited
US2822581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |