US2670267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treatment of n-alkyl polyamides
Assignee: EIDP Inc
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Filing: 1950-05-02
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Granted: 1954-02-23
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Expires: 1970-05-02
Abstract
No abstract record available.
Inventors
- 👤 Olaf A Bredeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:54
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/78; D01F6/80; Y; Y10; Y10S; Y10S8/00; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE PROCESS WHICH COMPRISES HEATING YARNS OF ORIENTED FILAMENTS OF A COPOLYAMIDE PRODUCED BY REACTING (1) AT LEAST ONE UNSUBSTITUTED ALIPHATIC DIAMINE CONTAINING A STRAIGHT CHAIN OF AT LEAST FIVE CARBON ATOMS SEPARATING THE AMINE GROUPS, (2) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF N-ALKYL SUBSTITUTED ALIPHATIC DIAMINES AND N,N''-DIALKYL SUBSTITUTED ALIPHATIC DIAMINES EACH CONTAINING A STRAIGHT CHAIN OF AT LEAST FIVE CARBON ATOMS SEPARATING THE AMINE GROUPS AND EACH ALKYL GROUP CONTAINING AT LEAST TWO CARBON ATOMS, AND (3) AT LEAST ONE STRAIGHT CHAIN ALIPHATIC DIBASIC CARBOXYLIC ACID CONTAINING AT LEAST SIX CARBON ATOMS IN THE CHAIN, THE RELATIVE PROPORTIONS OF SAID UNSUBSTITUTED DIAMINES, ALKYL SUBSTITUTED DIAMINES, AND ACIDS BEING SUCH AS TO COME WITHIN THE AREA ABCD OF FIG. 1 OF THE ACCOMPANYING DRAWING, IN A MEDIUM
Claim 2
Dependent Claim
131 words
THE PROCESS WHICH COMPRISES HEATING YARNS OF ORIENTED FILAMENTS OF A COPOLYAMIDE PRODUCED BY REACTING (1) AT LEAST ONE UNSUBSTITUTED ALIPHATIC DIAMINE CONTAINING A STRAIGHT CHAIN OF AT LEAST FIVE CARBON ATOMS SEPARATING THE AMINE GROUPS, (2) AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF N-ALKYL SUBSTITUTED ALIPHATIC DIAMINES AND N,N''-DIALKYL SUBSTITUTED ALIPHATIC DIAMINES EACH CONTAINING A STRAIGHT CHAIN OF AT LEAST FIVE CARBON ATOMS SEPARATING THE AMINE GROUPS AND EACH ALKYL GROUP CONTAINING AT LEAST TWO CARBON ATOMS, AND (3) AT LEAST ONE STRAIGHT CHAIN ALIPHATIC DIBASIC CARBOXYLIC ACID CONTAINING AT LEAST SIX CARBON ATOMS IN THE CHAIN, THE RELATIVE PROPORTIONS OF SAID UNSUBSTITUTED DIAMINES, ALKYL SUBSTITUTED DIAMINES, AND ACIDS BEING SUCH AS TO COME WITHIN THE AREA ABCD OF FIG. 1 OF THE ACCOMPANYING DRAWING, IN A MEDIUM
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |