Patent US2948715A successfully refreshed from Google Patents.
US2948715A
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Pigment dyestuffs
Assignee: Hoechst AG
•
Filing: 1958-08-19
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Granted: 1960-08-09
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Expires: 1978-08-19
Abstract
No abstract record available.
Inventors
- 👤 Siebert Arthur
- 👤 Renner Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:02
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/10; C09B29/18; C09B29/20; Y; Y10; Y10S; Y10S534/00; Y10S534/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
LAKES SELECTED FROM THE GROUP CONSISTING OF BARIUM, CALCIUM AND STRONTIUM LAKES OF AZO-DYESTUFFS CORRESPONDING TO THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
20 words
LAKES SELECTED FROM THE GROUP CONSISTING OF BARIUM, CALCIUM AND STRONTIUM LAKES OF AZO-DYESTUFFS CORRESPONDING TO THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
US1815133A
Cited
US2811515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |