US2691027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 5-hydroxy-acylamino anthraquinones
Assignee: BASF Schweiz AG
•
Filing: 1950-07-28
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Granted: 1954-10-05
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Expires: 1970-07-28
Abstract
No abstract record available.
Inventors
- 👤 Grossmann Paul
- 👤 Kern Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:03
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/516; C09B1/5165; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A DYESTUFF 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) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |