Patent US1918047A successfully refreshed from Google Patents.
US2583574A
Expired / Lapsed
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Acrolein and sulfur halide process to strengthen protein fibers
Assignee: Individual
•
Filing: 1949-08-30
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Granted: 1952-01-29
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Expires: 1969-08-30
Abstract
No abstract record available.
Inventors
- 👤 Harrison W Jones
- 👤 Walter J Thorsen
- 👤 Harold P Lundgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:56
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/12; D06M13/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE CHEMICAL MODIFICATION OF PROTEIN FIBERS WHICH COMPRISES IMPREGNATING THE FIBER WITH AN AQUEOUS SOLUTION OF ACROLEIN HAVING A CONCENTRATION FROM ABOUT 20% TO SATURATION AT AT TEMPERATURE FROM ABOUT 4* C. TO ABOUT 120* C. TO CHEMICALLY COMBINED ACROLEIN WITH THE FIBER, WASHING AND DRYING THE FIBER, THEN IMPREGNATING IT WITH A SOLUTION OF SULPHUR HALIDE IN AN INERT, ORGANIC SOLVENT AT A TEMPERATURE FROM ABOUT 20* C. TO ABOUT 120* C.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE CHEMICAL MODIFICATION OF PROTEIN FIBERS WHICH COMPRISES IMPREGNATING THE FIBER WITH AN AQUEOUS SOLUTION OF ACROLEIN HAVING A CONCENTRATION FROM ABOUT 20% TO SATURATION AT AT TEMPERATURE FROM ABOUT 4* C. TO ABOUT 120* C. TO CHEMICALLY COMBINED ACROLEIN WITH THE FIBER, WASHING AND DRYING THE FIBER, THEN IMPREGNATING IT WITH A SOLUTION OF SULPHUR HALIDE IN AN INERT, ORGANIC SOLVENT AT A TEMPERATURE FROM ABOUT 20* C. TO ABOUT 120* C.
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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |