US2877167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophilic cyanide of para-amino triphenylmethane dyes
Assignee: Individual
•
Filing: 1957-06-19
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Granted: 1959-03-10
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Expires: 1977-06-19
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; C; C09; C09B; C09B11/00; C09B11/04; Y; Y10; Y10S; Y10S204/00; Y10S204/901
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
28 words
A PROCES FOR FORMING A COLORED COMPOUND COMPRISING IRRADIATING WITH ULTRAVIOLET LIGHT IN THE PRESENCE OF AN ACTIVATOR CONSISTING OF WATER, A HYDROPHILIC DYE CYANIDE HAVING THE FORMULA
References Cited (Backward Citations)
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US2325038A
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US2441561A
Cited
US2469682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |