US2829149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New fuchsine cyanide
Assignee: Individual
•
Filing: 1956-06-29
•
Granted: 1958-04-01
•
Expires: 1976-06-29
Abstract
No abstract record available.
Inventors
- 👤 Chalkley Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:22
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/22; G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AS A PRODUCT, 4,4'',4"-TRIAMINO-3,3'',3"-TRIMETHYL TRIPHENYLACETONITRILE, HAVING THE FORMULA
Claim 2
Dependent Claim
8 words
AS A PRODUCT, 4,4'',4"-TRIAMINO-3,3'',3"-TRIMETHYL TRIPHENYLACETONITRILE, HAVING THE FORMULA
References Cited (Backward Citations)
US2325038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |