Patent US2697712A successfully refreshed from Google Patents.
US2697712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Z-benz
Assignee: —
•
Filing: —
•
Granted: 1954-12-21
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Expires: 1971-12-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:55
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D235/04; C07D235/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
AS NEW COMPOUNDS, THE DIBENZIMIDAZOLYL METHANES OF THE GROUPS CONSISTING OF DI(2-BENZIMIDAZOLYL)-METHANE AND ITS NUCLEAR METHOXY AND LOWER ALKYL DERIVATIVES.
Claim 2
Dependent Claim
20 words
AS NEW COMPOUNDS, THE DIBENZIMIDAZOLYL METHANES OF THE GROUPS CONSISTING OF DI(2-BENZIMIDAZOLYL)-METHANE AND ITS NUCLEAR METHOXY AND LOWER ALKYL DERIVATIVES.
Claim 3
Dependent Claim
51 words
A PROCESS OF PREPARING A COLORING MATTER, WHICH COMPRISES REACTING WITH AN OXIDIZING AGENT UPON A DIBENZIMIDAZOLYL-METHANE OF THE GROUP CONSISTING OF DI(2BENZIMIDAZOLYL)-METHANE AND ITS NUCLEAR METHOXY AND LOWER ALKAYL DERIVATIVES, WHEREBY TO JOIN TWO MOLECULES OF SAID COMPOUND AT THE METHANE CARBON ATOMS IN THE FORM OF AN ETHYLENE LINKAGE.
Claim 4
Dependent Claim
51 words
A PROCESS OF PREPARING A COLORING MATTER, WHICH COMPRISES REACTING WITH AN OXIDIZING AGENT UPON A DIBENZIMIDAZOLYL-METHANE OF THE GROUP CONSISTING OF DI(2BENZIMIDAZOLYL)-METHANE AND ITS NUCLEAR METHOXY AND LOWER ALKAYL DERIVATIVES, WHEREBY TO JOIN TWO MOLECULES OF SAID COMPOUND AT THE METHANE CARBON ATOMS IN THE FORM OF AN ETHYLENE LINKAGE.
References Cited (Backward Citations)
US2271378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |