Patent US3190872A successfully refreshed from Google Patents.
US3190872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble disazo dyestuffs
Assignee: BASF Corp
•
Filing: 1962-05-21
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Granted: 1965-06-22
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Expires: 1982-05-21
Abstract
No abstract record available.
Inventors
- 👤 Oesterlein Fritz
- 👤 Riat Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:24
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/022; C09B62/026; C09B62/03; C09B62/04; C09B62/08; C09B62/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE DISAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE DISAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2945021A
Cited
AT214546B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |