US2793192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical bleaching compositions containing tertiary amino substituted 2-aryl aryleneazoles
Assignee: Wyeth Holdings LLC
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Filing: 1953-10-14
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Granted: 1957-05-21
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Expires: 1973-10-14
Abstract
No abstract record available.
Inventors
- 👤 Leavitt Julian Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:39
CPC Classifications
D; D06; D06L; D06L4/00; D06L4/60; D06L4/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
OPTICAL BLEACHING AGENT COMPOSITIONS COMPRISING A MIXTURE OF 62-93.5% OF A 4''-TERTIARY AMINO SUBSTITUTED 2-PHENYLBENOTHIAZOLE AND 6.5-38% OF A TERTIARY AMINO SUBSTITUTED 2-PHENYLBENOZTHIAZOLE IN WHICH THE SUBSTITUENTS ON THE AMINO NITROGEN ARE ALIPHATIC GROUPS, EACH OF SAID GROUPS BEING OF LESS THAN 7 CARBON ATOMS, THE SAID ALIPHATIC GROUPS BEING FREE OF ACIDIC AND BASIC SUBSTITUENTS.
Claim 2
Dependent Claim
56 words
OPTICAL BLEACHING AGENT COMPOSITIONS COMPRISING A MIXTURE OF 62-93.5% OF A 4''-TERTIARY AMINO SUBSTITUTED 2-PHENYLBENOTHIAZOLE AND 6.5-38% OF A TERTIARY AMINO SUBSTITUTED 2-PHENYLBENOZTHIAZOLE IN WHICH THE SUBSTITUENTS ON THE AMINO NITROGEN ARE ALIPHATIC GROUPS, EACH OF SAID GROUPS BEING OF LESS THAN 7 CARBON ATOMS, THE SAID ALIPHATIC GROUPS BEING FREE OF ACIDIC AND BASIC SUBSTITUENTS.
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) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |