US2599147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromiferous monoazo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1949-02-07
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Granted: 1952-06-03
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Expires: 1969-02-07
Abstract
No abstract record available.
Inventors
- 👤 Widmer Willy
- 👤 Brassel Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COMPLEX CHROMIUM COMPOUND OF A MONOAZO-DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
10 words
A COMPLEX CHROMIUM COMPOUND OF A MONOAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US1011770A
Cited
US1038884A
Cited
US2353675A
Cited
US2400092A
Cited
US2452171A
Cited
CH270540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |