Patent US2871232A successfully refreshed from Google Patents.
US2871232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromic salts of o-alkoxy-o'-hydroxy monoazo compounds
Assignee: EIDP Inc
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Filing: 1956-06-07
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Granted: 1959-01-27
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Expires: 1976-06-07
Abstract
No abstract record available.
Inventors
- 👤 Csendes Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:05
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE FORMULA
References Cited (Backward Citations)
US1693448A
Cited
US2008602A
Cited
US2709698A
Cited
US2749332A
Cited
US2767166A
Cited
US2756223A
Cited
US2730521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |