Patent US2777830A successfully refreshed from Google Patents.
US2777830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeable polyesters
Assignee: —
•
Filing: —
•
Granted: 1957-01-15
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Expires: 1974-01-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/78; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A SHAPED ARTICLE PREPARED FROM A LINEAR FIBER-FORMING POLYMERIC DICARBOXYLIC ACID-DIGLYCOL ESTER BY A HOTMELT EXTRUDING PROCESS, THE SAID POLYMERIC ESTER HAVING AN IMIDO SIDE GROUP WHICH UPON HYDROLYSIS WITH HYDRAZINE IS CONVERTED TO AN NH2 GROUP, AND IS THEM DYEABLE WITH ACID DYES.
Claim 2
Dependent Claim
44 words
A SHAPED ARTICLE PREPARED FROM A LINEAR FIBER-FORMING POLYMERIC DICARBOXYLIC ACID-DIGLYCOL ESTER BY A HOTMELT EXTRUDING PROCESS, THE SAID POLYMERIC ESTER HAVING AN IMIDO SIDE GROUP WHICH UPON HYDROLYSIS WITH HYDRAZINE IS CONVERTED TO AN NH2 GROUP, AND IS THEM DYEABLE WITH ACID DYES.
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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |