Patent US2988544A successfully refreshed from Google Patents.
US2988544A
Expired / Lapsed
US
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Pigment dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1959-01-19
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Granted: 1961-06-13
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Expires: 1979-01-19
Abstract
No abstract record available.
Inventors
- 👤 Frey Christoph
- 👤 Ronco Karl
- 👤 Schmid Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
C; C09; C09B; C09B69/00; C09B43/00; C09B43/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A PIGMENT DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A PIGMENT DYESTUFF OF THE 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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |