Patent US2835550A successfully refreshed from Google Patents.
US2835550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing wool
Assignee: EIDP Inc
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Filing: 1954-08-24
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Granted: 1958-05-20
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Expires: 1974-08-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Laucius
- 👤 Robert A Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:12
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/14; D06P3/20; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6138; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN THE PROCESS OF DYEING WOOL AT A PH OF 7.5 TO 5.5 WITH NEUTRAL DYEING, METALLIZED COMPLEXES OF ORTHOHYDROXYAZO DYES WHICH ARE FREE OF SALT-FORMING ACID SUBSTITUENTS AND WHOSE STRUCTURE EMBRACES TWO MOLECULES OF A MONOAZO DYE AND ONE ATOM OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT THE IMPROVEMENT WHICH CONSISTS OF EFFECTING THE DYEING IN THE PRESENCE OF AN AUXILIARY AGENT AND OF A REAGENT ADAPTED TO GENERATE ACID AT THE DYEING TEMPERATURE, SAID AUXILIARY AGENT BEING A POLY-OXYALKYLENE GLYCOL FORMED BY CONDENSING ETHYLENE OXIDE AND POLYOXYPROPYLENE GLYCOL, SAID AGENT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 7000 TO 9000, AND SAID POLYOXYPROPYLENE COMPONENT CONSTITUTING FROM 10 TO 22% BY WEIGHT OF THE ENTIRE MOLECULE, SAID AUXILIARY AGENT BEING PRESENT IN QUANTITY NOT EXCEEDING 2% BY WEIGHT OF THE FIBER.
Claim 2
Dependent Claim
138 words
IN THE PROCESS OF DYEING WOOL AT A PH OF 7.5 TO 5.5 WITH NEUTRAL DYEING, METALLIZED COMPLEXES OF ORTHOHYDROXYAZO DYES WHICH ARE FREE OF SALT-FORMING ACID SUBSTITUENTS AND WHOSE STRUCTURE EMBRACES TWO MOLECULES OF A MONOAZO DYE AND ONE ATOM OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT THE IMPROVEMENT WHICH CONSISTS OF EFFECTING THE DYEING IN THE PRESENCE OF AN AUXILIARY AGENT AND OF A REAGENT ADAPTED TO GENERATE ACID AT THE DYEING TEMPERATURE, SAID AUXILIARY AGENT BEING A POLY-OXYALKYLENE GLYCOL FORMED BY CONDENSING ETHYLENE OXIDE AND POLYOXYPROPYLENE GLYCOL, SAID AGENT HAVING A MOLECULAR WEIGHT IN THE RANGE OF 7000 TO 9000, AND SAID POLYOXYPROPYLENE COMPONENT CONSTITUTING FROM 10 TO 22% BY WEIGHT OF THE ENTIRE MOLECULE, SAID AUXILIARY AGENT BEING PRESENT IN QUANTITY NOT EXCEEDING 2% BY WEIGHT OF THE FIBER.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |