US2918344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing polyethylene terephthalate
Assignee: BASF Schweiz AG
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Filing: 1956-07-23
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Granted: 1959-12-22
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Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Jenny Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/16; D06P1/20; C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/40; D06P3/00; D06P3/34; D06P3/36; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR DYEING POLYETHYLENE TEREPHTHALATE FIBERS, WHEREIN THERE IS USED AS DYESTUFF A 1-AMINO-2-NITRO4-ACYLAMINOANTHRAQUINONE, WHICH CONTAINS A SIMPLE ANTHRAQUINONE NUCLEUS AND OF WHICH THA AMINO GROUP IS A PRIMARY ONE AND OF WHICH THE ACYLAMINO GROUP IS DERIVED FROM A PRIMARY AMINO GROUP HAVING AN ACYL RADICAL OF AN ALIPHATIC MONOCARBOXYLIC ACID WHICH CONTINS 2-6 CARBON ATOMS.
Claim 2
Dependent Claim
58 words
A PROCESS FOR DYEING POLYETHYLENE TEREPHTHALATE FIBERS, WHEREIN THERE IS USED AS DYESTUFF A 1-AMINO-2-NITRO4-ACYLAMINOANTHRAQUINONE, WHICH CONTAINS A SIMPLE ANTHRAQUINONE NUCLEUS AND OF WHICH THA AMINO GROUP IS A PRIMARY ONE AND OF WHICH THE ACYLAMINO GROUP IS DERIVED FROM A PRIMARY AMINO GROUP HAVING AN ACYL RADICAL OF AN ALIPHATIC MONOCARBOXYLIC ACID WHICH CONTINS 2-6 CARBON ATOMS.
References Cited (Backward Citations)
US2063027A
Cited
US2155673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |