Patent US3046209A successfully refreshed from Google Patents.
US3046209A
Expired / Lapsed
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Preparation of triphenylmethane dyes
Assignee: Horizons Inc
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Filing: 1961-01-12
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Granted: 1962-07-24
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Expires: 1981-01-12
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:50
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/26; C09B11/10; C09B11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A PROCESS FOR FORMING TRIPHENYLMETHANE DYES WHICH COMPRISES FORMING A MIXTURE CONTAINING (1) A COLORLESS ARYLAMINE REPRESENTED BY A FORMULA SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
26 words
A PROCESS FOR FORMING TRIPHENYLMETHANE DYES WHICH COMPRISES FORMING A MIXTURE CONTAINING (1) A COLORLESS ARYLAMINE REPRESENTED BY A FORMULA SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2726252A
Cited
US2855303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |