US2592616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating nylon
Assignee: Polymer Corp
•
Filing: 1949-05-26
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Granted: 1952-04-15
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Expires: 1969-05-26
Abstract
No abstract record available.
Inventors
- 👤 Louis L Stott
- 👤 Laurence R B Hervey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/11; C08J2377/00; Y; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
THE PROCESS OF DISSOLVING SYNTHETIC LINEAR POLYAMIDES NORMALLY SOLUBLE IN PHENOL AND NORMALLY INSOLUBLE IN METHYL ALCOHOL WHICH COMPRISES FORMING A MIXTURE CONSISTING OF SAID POLYAMIDE WITH SUBSTANTIALLY ANHYDROUS METHYL ALCOHOL, PLACING SAID MIXTURE IN A CLOSED OXYGEN-FREE SYSTEM AND HEATING SAID MIXTURE UNDER PRESSURE TO A TEMPERATURE SUFFICIENT TO DISSOLVE SAID POLYAMIDE, SAID TEMPERATURE AND PRESSURE BEING ABOVE THE BOILING POINT OF SAID METHYL ALCOHOL, AND COOLING SAID SOLUTION TO PRECIPITATE SAID POLYAMIDE, AND POLYAMIDE BEING ONE WHICH IS NORMALLY SOLUBLE IN PHENOL AND NORMALLY INSOLUBLE IN METHYL ALCOHOL AND BEING ONE WHICH ON HYDROLYSIS WITH HYDROCHLORIC ACID YIELDS MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) AMINO ACID HYDROCHLORIDE; AND (B) MIXTURES OF DIAMINE HYDROCHLORIDE AND DIBASIC CARBOXYLIC ACID.
Claim 2
Dependent Claim
121 words
THE PROCESS OF DISSOLVING SYNTHETIC LINEAR POLYAMIDES NORMALLY SOLUBLE IN PHENOL AND NORMALLY INSOLUBLE IN METHYL ALCOHOL WHICH COMPRISES FORMING A MIXTURE CONSISTING OF SAID POLYAMIDE WITH SUBSTANTIALLY ANHYDROUS METHYL ALCOHOL, PLACING SAID MIXTURE IN A CLOSED OXYGEN-FREE SYSTEM AND HEATING SAID MIXTURE UNDER PRESSURE TO A TEMPERATURE SUFFICIENT TO DISSOLVE SAID POLYAMIDE, SAID TEMPERATURE AND PRESSURE BEING ABOVE THE BOILING POINT OF SAID METHYL ALCOHOL, AND COOLING SAID SOLUTION TO PRECIPITATE SAID POLYAMIDE, AND POLYAMIDE BEING ONE WHICH IS NORMALLY SOLUBLE IN PHENOL AND NORMALLY INSOLUBLE IN METHYL ALCOHOL AND BEING ONE WHICH ON HYDROLYSIS WITH HYDROCHLORIC ACID YIELDS MATERIAL SELECTED FROM THE GROUP CONSISTING OF (A) AMINO ACID HYDROCHLORIDE; AND (B) MIXTURES OF DIAMINE HYDROCHLORIDE AND DIBASIC CARBOXYLIC ACID.
References Cited (Backward Citations)
US2359877A
Cited
US2374126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |