Patent US2877169A successfully refreshed from Google Patents.
US2877169A
Expired / Lapsed
US
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Hydrophilic dye cyanides-hydroxyalkyl compounds
Assignee: Individual
•
Filing: 1957-07-05
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Granted: 1959-03-10
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/12; C09B67/00; C09B67/0033; C09B67/0034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
THE PROCESS OF FORMING A COLORED COMPOUND, COMPRISING IRRADIATING WITH ULTRAVIOLET ENERGY IN THE PRESENCE OF AN ACTIVATOR A HYDROPHILIC CYANIDE HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
THE PROCESS OF FORMING A COLORED COMPOUND, COMPRISING IRRADIATING WITH ULTRAVIOLET ENERGY IN THE PRESENCE OF AN ACTIVATOR A HYDROPHILIC CYANIDE HAVING THE FORMULA
References Cited (Backward Citations)
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US2726252A
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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 |