US2880050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butyl benzoate as a dyeing assistant
Assignee: Celanese Corp
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Filing: 1956-01-27
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Granted: 1959-03-31
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Expires: 1976-01-27
Abstract
No abstract record available.
Inventors
- 👤 Fortess Fred
- 👤 Rudy Jerome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:00
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/62; D06P1/621; D06P1/627; D06P1/64; D06P1/651; D06P1/65106; D06P1/65125; D06P1/6515; D06P1/65162; D06P1/667; Y; Y10; Y10S; Y10S8/00; Y10S8/04; Y10S8/907; Y10S8/908; Y10S8/912
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
PROCESS FOR THE DYEING OF A TEXTILE MATERIAL HAVING A BASIS OF FILAMENTS OF CELLULOSE ACETATE HAVING AN ACETYL VALUE OF AT LEAST ABOUT 61% CALCULATED AS COMBINED ACETIC ACID AND FILAMENTS OF POLYETHLENE TEREPHTHALATE WHICH COMPRISES BRINGING SAID TEXTILE MATERIAL INTO CONTACT WITH AN AQUEOUS BATH CONTAINING A DISPERSE CELLULOSE ACETATE DYESTUFF IN THE PRESENCE OF BUTYL BENZOATE AS AN ASSISTANT FOR INCREASING THE RATE OF DYEING.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |