US2585681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antigas fading anthraqijinone dyes
Assignee: —
•
Filing: —
•
Granted: 1952-02-12
•
Expires: 1969-02-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:49
CPC Classifications
C; C09; C09B; C09B69/00; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
DYESTUFFS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
5 words
DYESTUFFS OF THE GENERAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |