Patent US261500A successfully refreshed from Google Patents.
Patent US3005833A successfully refreshed from Google Patents.
US3005833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigment dyestuffs of the anthraquinone series
Assignee: Saul and Co
•
Filing: 1954-05-10
•
Granted: 1961-10-24
•
Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Gutzwiller-Markees Jenny
- 👤 Schoenauer Wolfgang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:28
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/542; C09B1/16; C09B1/20; C09B1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
THE PIGMENT DYESTUFF OF THE ANTHRAQUINONE SERIES WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
12 words
THE PIGMENT DYESTUFF OF THE ANTHRAQUINONE SERIES WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
NL50530C
Cited
US1736088A
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 |