US2570449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of production of synthetic material from starch or starch containing substances
Assignee: Individual
•
Filing: 1947-01-04
•
Granted: 1951-10-09
•
Expires: 1967-01-04
Abstract
No abstract record available.
Inventors
- 👤 Horsak Drahomir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:23
CPC Classifications
D; D01; D01F; D01F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PRODUCING SYNTHETIC THREADS, AND THE LIKE FROM STARCH-CONTAINING MATERIALS, WHICH COMPRISES ADDING WATER AND AT LEAST ONE SUBSTANCE CAPABLE OF IMPARTING THERETO THERMOPLASTICITY TO THE MATERIAL TO CONVERT THE MATERIAL INTO A PSEUDO-THERMOPLAST, GELATINIZING SAID MATERIAL, ELMINIATING TH EXCESS WATER PRESENT IN THE GELATINIZED MASS, EXTRUDING SAID GELATINIZED MASS AT RAISED TEMPERATURE AND INCREASED PRESSURE, AND PASSING THE EXTRUDED MATERIAL THROUG A LIQUID BATH HAVING A HARDENING ACTION ON THE SHAPED MATERIAL BUT LEAVING THE STARCH COMPONENT OTHERWISE UNAFFECTED.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PRODUCING SYNTHETIC THREADS, AND THE LIKE FROM STARCH-CONTAINING MATERIALS, WHICH COMPRISES ADDING WATER AND AT LEAST ONE SUBSTANCE CAPABLE OF IMPARTING THERETO THERMOPLASTICITY TO THE MATERIAL TO CONVERT THE MATERIAL INTO A PSEUDO-THERMOPLAST, GELATINIZING SAID MATERIAL, ELMINIATING TH EXCESS WATER PRESENT IN THE GELATINIZED MASS, EXTRUDING SAID GELATINIZED MASS AT RAISED TEMPERATURE AND INCREASED PRESSURE, AND PASSING THE EXTRUDED MATERIAL THROUG A LIQUID BATH HAVING A HARDENING ACTION ON THE SHAPED MATERIAL BUT LEAVING THE STARCH COMPONENT OTHERWISE UNAFFECTED.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |