US3005822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New 1:4-dihydroxy-5-acylaminoanthraquinones
Assignee: BASF Schweiz AG
•
Filing: 1958-05-23
•
Granted: 1961-10-24
•
Expires: 1978-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jenny Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:26
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/516; C09B1/5165; Y; Y10; Y10S; Y10S8/00; Y10S8/904; Y10S8/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
1,4-DIHYDROXY-5-ACYLAMINOANTHRAQUINONE OF THE FORMULA
Claim 2
Dependent Claim
4 words
1,4-DIHYDROXY-5-ACYLAMINOANTHRAQUINONE OF THE FORMULA
References Cited (Backward Citations)
US2691027A
Cited
US2819288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-23 | 1965-04-24 | 1965-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-23 | 1969-04-24 | 1969-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-23 | 1973-04-24 | 1973-10-24 | $7700.00 | Window Closed / Lapsed |