Patent US3617185A successfully refreshed from Google Patents.
US3617185A
Expired / Lapsed
US
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Stable highly concentrated solutions of basic dyes
Assignee: GAF Corp
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Filing: 1968-08-19
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Granted: 1971-11-02
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Expires: 1988-08-19
Abstract
Abstract A composition which is employed in the preparation of solutions of basic dyes to maintain their stability during extended periods of storage which comprises in admixture methyl alcohol, 2,2''thiodiethanol, and a basic dye stock.
Inventors
- 👤 Walter G Drautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:59
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0077; C09B67/0075; C09B67/0076
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
The concentrated solution of claim 1 further containing a nonionic surfactant.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |