US2543994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vat dyeing of acrylonitrile polymers
Assignee: EIDP Inc
•
Filing: 1947-08-29
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Granted: 1951-03-06
•
Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas Robert Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/228
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS OF VAT DYEING STRUCTURES PREPARED FROM ACRYLONITRILE POLYMERS CONTAINING AT LEAST 85% ACRYLONITRILE WHICH COMPRISES TREATING SAID STRUCTURES WITH AN AQUEOUS DYE BATH CONTAINING 0.5% TO 5% OF AN AROMATIC MONOAMINE CONTAINING NO OTHER SOLUBILIZING GROUP AND AN ALKALINE SOLUTION OF A REDUCED VAT DYE SELECTED FROM THE GROUP CONSISTING OF INDIGO AND THIOINDIGO VAT DYES.
Claim 2
Dependent Claim
58 words
A PROCESS OF VAT DYEING STRUCTURES PREPARED FROM ACRYLONITRILE POLYMERS CONTAINING AT LEAST 85% ACRYLONITRILE WHICH COMPRISES TREATING SAID STRUCTURES WITH AN AQUEOUS DYE BATH CONTAINING 0.5% TO 5% OF AN AROMATIC MONOAMINE CONTAINING NO OTHER SOLUBILIZING GROUP AND AN ALKALINE SOLUTION OF A REDUCED VAT DYE SELECTED FROM THE GROUP CONSISTING OF INDIGO AND THIOINDIGO VAT DYES.
References Cited (Backward Citations)
GB479867A
Cited
FR847107A
Cited
US2347508A
Cited
US2257076A
Cited
US2362375A
Cited
GB583939A
Cited
US2404727A
Cited
US2431956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |