US3336429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming shaped articles of amylose
Assignee: FMC Corp
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Filing: 1964-07-10
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Granted: 1967-08-15
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Expires: 1984-07-10
Abstract
No abstract record available.
Inventors
- 👤 Frank E Carevic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF FORMING SHAPED ARTICLES FROM AMYLOSE WHEREIN AN AQUEOUS CAUSTIC SOLUTION OF AMYLOSE IS EXTRUDED IN THE FORM OF A SHAPED ARTICLE INTO AN AQUEOUS ACID BATH CONTAINING FROM ABOUT 20 TO 40% BY WEIGHT OF AN INORGANIC SULFATE SALT AND FROM ABOUT 5 TO 20% BY WEIGHT OF SULFURIC ACID, THE IMPROVEMENT WHICH COMPRISES DISSOLVING FROM ABOUT 12 TO 25%, BASED ON THE WEIGHT OF THE AMYLOSE, OF A STARCH CONTAINING A MAJOR PROPORTION OF AMYLOSE IN AN AQUEOUS CAUSTIC SOSLUTION CONSISTING ESSENTIALLY OF FROM 4 TO 10% BY WEIGHT OF POTASSIUM HYDROXIDE AND FROM ABOUT 0.1 TO ABOUT 1.6% BY WEIGHT OF SODIUM HYDROXIDE.
Claim 2
Independent Claim
108 words
A METHOD OF FORMING SHAPED ARTICLES FROM AMYLOSE WHEREIN AN AQUEOUS CAUSTIC SOLUTION OF AMYLOSE IS EXTRUDED IN THE FORM OF A SHAPED ARTICLE INTO AN AQUEOUS ACID BATH CONTAINING FROM ABOUT 20 TO 40% BY WEIGHT OF AN INORGANIC SULFATE SALT AND FROM ABOUT 5 TO 20% BY WEIGHT OF SULFURIC ACID, THE IMPROVEMENT WHICH COMPRISES DISSOLVING FROM ABOUT 12 TO 25%, BASED ON THE WEIGHT OF THE AMYLOSE, OF A STARCH CONTAINING A MAJOR PROPORTION OF AMYLOSE IN AN AQUEOUS CAUSTIC SOSLUTION CONSISTING ESSENTIALLY OF FROM 4 TO 10% BY WEIGHT OF POTASSIUM HYDROXIDE AND FROM ABOUT 0.1 TO ABOUT 1.6% BY WEIGHT OF SODIUM HYDROXIDE.
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) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |