Patent US2698218A successfully refreshed from Google Patents.
US2698218A
Expired / Lapsed
US
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Coloration of cellulose acetate
Assignee: T E Marchington & Co Ltd
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Filing: 1948-10-13
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Granted: 1954-12-28
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Expires: 1968-10-13
Abstract
No abstract record available.
Inventors
- 👤 Sutton George Donald
- 👤 Boothby Sarah Hannah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:18
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; D06P3/403; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
PROCESS FOR DYEING TEXTILE MATERIAL COMPRISING CELLULOSE ACETATE WHICH PROCESS INCLUDES THE STEPS OF IMMERSING THE MATERIAL IN A DYEBATH CONSISTING ESSENTIALLY OF WATER, A VAT DYESTUFF, AND A SULPHOXYLIC REDUCING AGENT, AT TEMPERATURES OF THE ORDER OF 90* C.-100* C., AND FOR FROM 10 TO 15 MINUTES, AND SUBSEQUENTLY OXIDIZING THE DYESTUFF.
Claim 2
Dependent Claim
53 words
PROCESS FOR DYEING TEXTILE MATERIAL COMPRISING CELLULOSE ACETATE WHICH PROCESS INCLUDES THE STEPS OF IMMERSING THE MATERIAL IN A DYEBATH CONSISTING ESSENTIALLY OF WATER, A VAT DYESTUFF, AND A SULPHOXYLIC REDUCING AGENT, AT TEMPERATURES OF THE ORDER OF 90* C.-100* C., AND FOR FROM 10 TO 15 MINUTES, AND SUBSEQUENTLY OXIDIZING THE DYESTUFF.
References Cited (Backward Citations)
GB400643A
Cited
US2424857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |