US2990405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirit soluble black dyes
Assignee: Wyeth Holdings LLC
•
Filing: 1959-05-26
•
Granted: 1961-06-27
•
Expires: 1979-05-26
Abstract
No abstract record available.
Inventors
- 👤 Foster L Pepper
- 👤 Norman W Fiess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
C; C09; C09B; C09B17/00; C09B17/02; C09B69/00; C09B69/02; C09B69/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
ARYL GUANIDINE SALTS OF SULFONATED NIGTOSENSE, THE SAID SULFONATED NIGROSINES HAVING FROM 8-15% BY WEIGHT SULFUR CONTENT, THERE BEING FROM 0.5 TO 1.0 MOLE OF SAID ARYL GUANIDINE PER ATOM OF SULFUR, THE SAID ARYL GROUP BEING A CARBOCYCLIC 6-MEMBERED MONOCYCLIC ARYL RADICAL FREE OF SALT FORMING GROUPS.
Claim 2
Dependent Claim
48 words
ARYL GUANIDINE SALTS OF SULFONATED NIGTOSENSE, THE SAID SULFONATED NIGROSINES HAVING FROM 8-15% BY WEIGHT SULFUR CONTENT, THERE BEING FROM 0.5 TO 1.0 MOLE OF SAID ARYL GUANIDINE PER ATOM OF SULFUR, THE SAID ARYL GROUP BEING A CARBOCYCLIC 6-MEMBERED MONOCYCLIC ARYL RADICAL FREE OF SALT FORMING GROUPS.
References Cited (Backward Citations)
US1674128A
Cited
US2328759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |