US3029121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coloring by oxidizing solid polyesters of terephthalic acid and glycols and reacting with hydrazine compounds and products produced thereby
Assignee: EIDP Inc
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Filing: 1959-04-08
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Granted: 1962-04-10
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Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Robert J Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/58; D06M11/63; C; C08; C08L; C08L67/00; C09; C09B; C09B26/00; D06M11/32; D06M11/50; D06P; D06P3/00; D06P3/34; D06P3/52; D06P3/527; Y; Y10; Y10S; Y10S8/00; Y10S8/04; Y10S8/92; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE PROCESS OF MODIFYING SOLID LINEAR FIBER-FORMING POLYESTERS OF TEREPHTHALIC ACID AND A GLYCOL HAVING FROM 2 TO 10 CARBON ATOMS WHICH COMPRISES GENERATING CARBONYL GROUPS IN THE SURFACE OF THE POLYESTER BY EXPOSING THE SAME TO OXIDIZING CONDITIONS WITHOUT SIGNIFICANT DEGENERATION OF THE POLYESTER AND THEREAFTER CONTACTING WITHOUT SIGNIFICANTLY DISSOLVING THE ACTIVATED SURFACE WITH A DILUTE SOLUTION OF A HYDRAZINE COMPOUND OF THE FORMULA R1R2NNH2 IN WHICH EACH R1 AND R2 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN MONOVALENT HYDROCARBON RADICALS, HETEROHYDROCARBON RADICALS, NITRO SUBSTITUTED HYDROCARBON AMINO SUBSTITUTED HYDROCARBON HYDROXY SUBSTITUTED HYDROCARBON, HALOGEN SUBSTITUTED HYDROCARBON, AND HETEROHYDROCARBON RADICALS, UNTIL A CHANGE IN THE COLOR OF THE POLYESTER TAKES PLACE.
Claim 2
Dependent Claim
113 words
THE PROCESS OF MODIFYING SOLID LINEAR FIBER-FORMING POLYESTERS OF TEREPHTHALIC ACID AND A GLYCOL HAVING FROM 2 TO 10 CARBON ATOMS WHICH COMPRISES GENERATING CARBONYL GROUPS IN THE SURFACE OF THE POLYESTER BY EXPOSING THE SAME TO OXIDIZING CONDITIONS WITHOUT SIGNIFICANT DEGENERATION OF THE POLYESTER AND THEREAFTER CONTACTING WITHOUT SIGNIFICANTLY DISSOLVING THE ACTIVATED SURFACE WITH A DILUTE SOLUTION OF A HYDRAZINE COMPOUND OF THE FORMULA R1R2NNH2 IN WHICH EACH R1 AND R2 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROGEN MONOVALENT HYDROCARBON RADICALS, HETEROHYDROCARBON RADICALS, NITRO SUBSTITUTED HYDROCARBON AMINO SUBSTITUTED HYDROCARBON HYDROXY SUBSTITUTED HYDROCARBON, HALOGEN SUBSTITUTED HYDROCARBON, AND HETEROHYDROCARBON RADICALS, UNTIL A CHANGE IN THE COLOR OF THE POLYESTER TAKES PLACE.
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) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |