US2989363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving the dyeability of shaped structures of polyesters based on terephthalic acid
Assignee: Hoechst AG
•
Filing: 1957-03-05
•
Granted: 1961-06-20
•
Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Adolf
- 👤 Happe Wilhelm
- 👤 Gatys Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:20
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65106; D06P1/65143; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67375; D06P3/00; D06P3/34; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR IMPROVING THE DYEABILITY OF SHAPED STRUCTURES OF LINEAR POLYESTERS BASED ON TEREPHTHALIC ACID BY TREATING THEM WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND HALOGENATED SUL FONIC ACIDS, THE IMPROVEMENT WHICH COMPRISES TREATING THE STRUCTURES WITH A SOLUTION IN AN INERT SOLVENT OF ADDITION PRODUCTS SELECTED FROM THE GROUP CONSISTING OF ADDITION PRODUCTS OF AN ETHER WITH SULFUR TRIOXIDE, OF AN ETHER WITH A HALIDE OF A SULFUR OXYGEN ACID, OF AN ETHER WITH A MIXTURE OF SULFUR TRIOXIDE AND A HALOGENATED SULFONIC ACID, OF A TERTIARY AMINE WITH SULFUR TRIOXIDE, OF A TERTIARY AMINE WITH A HALOGENATED SULFONIC ACID AND OF A TERTIARY AMINE WITH A MIXTURE OF SULFUR TRIOXIDE AND A HALOGENATED SULFONIC ACID.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR IMPROVING THE DYEABILITY OF SHAPED STRUCTURES OF LINEAR POLYESTERS BASED ON TEREPHTHALIC ACID BY TREATING THEM WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SULFUR TRIOXIDE AND HALOGENATED SUL FONIC ACIDS, THE IMPROVEMENT WHICH COMPRISES TREATING THE STRUCTURES WITH A SOLUTION IN AN INERT SOLVENT OF ADDITION PRODUCTS SELECTED FROM THE GROUP CONSISTING OF ADDITION PRODUCTS OF AN ETHER WITH SULFUR TRIOXIDE, OF AN ETHER WITH A HALIDE OF A SULFUR OXYGEN ACID, OF AN ETHER WITH A MIXTURE OF SULFUR TRIOXIDE AND A HALOGENATED SULFONIC ACID, OF A TERTIARY AMINE WITH SULFUR TRIOXIDE, OF A TERTIARY AMINE WITH A HALOGENATED SULFONIC ACID AND OF A TERTIARY AMINE WITH A MIXTURE OF SULFUR TRIOXIDE AND A HALOGENATED SULFONIC ACID.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |