US2638403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of nylon with sulfonamide azo dyes
Assignee: Yorkshire Dyeware and Chemical Co Ltd
•
Filing: 1949-09-15
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Granted: 1953-05-12
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Expires: 1969-09-15
Abstract
No abstract record available.
Inventors
- 👤 Stead Ernest
- 👤 Murray Alec
- 👤 Burtonshaw Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:49
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE PROCESS OF DYEING NYLON WHICH COMPRISES BRINGING IT INTO CONTACT WITH AN AQEOUS DISPERSION OF A DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
22 words
THE PROCESS OF DYEING NYLON WHICH COMPRISES BRINGING IT INTO CONTACT WITH AN AQEOUS DISPERSION OF A DYESTUFF OF THE GENERAL FORMULA
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |