US2929810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Green dyes for polyester fibers
Assignee: Crompton and Knowles Corp
•
Filing: 1958-06-23
•
Granted: 1960-03-22
•
Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Roderick H Horning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:37
CPC Classifications
C; C09; C09B; C09B56/00; C09B56/12; C09B43/00; C09B43/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ANTHRAQUINONE COMPOUND HAVING THE FOLLOWING STRUCTURE:
Claim 2
Dependent Claim
7 words
AN ANTHRAQUINONE COMPOUND HAVING THE FOLLOWING STRUCTURE:
References Cited (Backward Citations)
US2108126A
Cited
US2145954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |