Patent US3021344A successfully refreshed from Google Patents.
US3021344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triphenylmethane dyes
Assignee: EIDP Inc
•
Filing: 1959-08-19
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Granted: 1962-02-13
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Expires: 1979-08-19
Abstract
No abstract record available.
Inventors
- 👤 Baer Donald Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:50
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/12; C09B11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A DYE HAVING THE STRUCTURE WHEREIN R IS A C1-4 ALKYL RADICAL AND A$ IS A WATERSOLUBILIZING ANION.
Claim 2
Dependent Claim
18 words
A DYE HAVING THE STRUCTURE WHEREIN R IS A C1-4 ALKYL RADICAL AND A$ IS A WATERSOLUBILIZING ANION.
References Cited (Backward Citations)
US1828077A
Cited
US2304946A
Cited
US2755202A
Cited
US2755203A
Cited
US2848296A
Cited
US2913303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |