Patent US2875211A successfully refreshed from Google Patents.
US2875211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic dyestuffs for the manufacture of colored writing agents
Assignee: Bayer AG
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Filing: 1955-07-26
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Granted: 1959-02-24
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Seibert Heinrich
- 👤 Triebeneck Kurt
- 👤 Bienert Berthold
- 👤 Baumann Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:24
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/16; C09D11/17; C09B; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26; C09B67/00; C09B67/0032; C09B69/00; C09B69/02; C09B69/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AS A NOVEL PRODUCT, THE SALT OF AN ACUD SELECTED FROM THE GROUP CONSISTING OF A HYDROCARBON HYDRROAROMATIC MONOCARBOXYLIC ACID, HYDROCARBON AROMATIC CARBOXYLIC ACID, AN ALKYL MONOCARBOXYLIC ACID, AN ALKYLENE POLYCARBOXYLIC ACID, THE CORRESPONDING ACID ALKYL ESTERS OF THE POLYCARBOXYLIC ACIDS AND A MINERAL ACID, WITH A SULFONAMIDE PHTHALOCYANINE DYESTUFF, SAID SULFONAMIDE BEING SUBSTITUTED AT THE SULFONAMIDE NITROGEN ATOM WITH AT LEAST ONE DI-LOWER ALKYLAMINO-LOWER ALKYLENE RADICAL.
Claim 2
Dependent Claim
67 words
AS A NOVEL PRODUCT, THE SALT OF AN ACUD SELECTED FROM THE GROUP CONSISTING OF A HYDROCARBON HYDRROAROMATIC MONOCARBOXYLIC ACID, HYDROCARBON AROMATIC CARBOXYLIC ACID, AN ALKYL MONOCARBOXYLIC ACID, AN ALKYLENE POLYCARBOXYLIC ACID, THE CORRESPONDING ACID ALKYL ESTERS OF THE POLYCARBOXYLIC ACIDS AND A MINERAL ACID, WITH A SULFONAMIDE PHTHALOCYANINE DYESTUFF, SAID SULFONAMIDE BEING SUBSTITUTED AT THE SULFONAMIDE NITROGEN ATOM WITH AT LEAST ONE DI-LOWER ALKYLAMINO-LOWER ALKYLENE RADICAL.
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US2285359A
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US2414050A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |