Patent US3634017A successfully refreshed from Google Patents.
US3634017A
Expired / Lapsed
US
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Oxazine dye concentrate with polyethylene oxide
Assignee: Hoechst AG
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Filing: 1968-12-10
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Granted: 1972-01-11
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Expires: 1988-12-10
Abstract
Abstract Stable, concentrated, aqueous solutions of basic oxazine dyestuffs of the formula IN WHICH R'' and R'''' represent lower alkyl groups, R1 and R2 represent hydrogen atoms or lower alkyl groups or phenyl unsubstituted or substituted in the benzene nucleus by methyl, methoxy or ethoxy groups, R3 represents hydrogen or methyl, and X represents a halogen ion, consisting essentially of (a) the hydrochlorides of the said oxazine dyestuffs and (b) high molecular polyglycols in an amount of about 2 to about 20 percent by weight calculated on the weight of the dyestuff.
Inventors
- 👤 Norbert Ottawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:49
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6138; C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0075; C09B67/0076; Y; Y10; Y10S; Y10S8/00; Y10S8/907
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
A solution according to claim 1 wherein said polyethylene glycol has a molecular weight of about 1,000 to about 5,000.
References Cited (Backward Citations)
US1970578A
Cited
US2828180A
Cited
US2764466A
Cited
US2922690A
Cited
GB981547A
Cited
US3346322A
Cited
GB1054746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |