US2716655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyes and dye intermediates of the anthraquinone series
Assignee: EIDP Inc
•
Filing: 1954-01-12
•
Granted: 1955-08-30
•
Expires: 1974-01-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Samuel N Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:51
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE COMPOUNDS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
THE COMPOUNDS OF THE GENERAL FORMULA:
References Cited (Backward Citations)
DE714986C
Cited
US2321767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |