Patent US2514740A successfully refreshed from Google Patents.
Patent US2628152A successfully refreshed from Google Patents.
US2628152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing modified polyacrylonitrile staple fabric
Assignee: EIDP Inc
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Filing: 1950-09-09
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Granted: 1953-02-10
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Expires: 1970-09-09
Abstract
No abstract record available.
Inventors
- 👤 Meunier Paul Louis
- 👤 Jr William Wygand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:36
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/653; D06P1/6536; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A PROCESS FOR DYEING MODIFIED POLYACRYLONITRILE STAPLE FABRIC, WHICH COMPRISES TREATING SAID FABRIC IN ROPE FORM WITH AN AQUEOUS SOLUTION OF AN ACID DYE IN THE PRESENCE OF SALICYLIC ACID.
Claim 2
Dependent Claim
30 words
A PROCESS FOR DYEING MODIFIED POLYACRYLONITRILE STAPLE FABRIC, WHICH COMPRISES TREATING SAID FABRIC IN ROPE FORM WITH AN AQUEOUS SOLUTION OF AN ACID DYE IN THE PRESENCE OF SALICYLIC 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) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |