US2933475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelates and methods of making the same
Assignee: EIDP Inc
•
Filing: 1955-09-20
•
Granted: 1960-04-19
•
Expires: 1975-09-20
Abstract
No abstract record available.
Inventors
- 👤 Fred W Hoover
- 👤 Henry C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
C; C08; C08G; C08G79/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SOLUTION FLUID AT ROOM TEMPERATURE, COMPRISING AS ITS ESSENTIAL INGREDIENTS, (A) AN ESTER HAVING A PLURALITY, M, OF HYDROXYL GROUPS ESTERIFIED WITH A B-KETOMONOCARBOXYLIC ACID HAVING HYDROGEN ON THE A-CARBON ATOM, THE ALCOHOL PORTION OF SAID ESTER BEING TAKEN FROM THE CLASS CONSISTING OF (1) POLYHYDRIC ALCOHOLS, AND (2) FREE HYDROXYL GROUP-CONTAINING POLYHYDRIC ALCOHOL ESTERS OF CARBOXYLIC ACIDS, AND (B) A POLYVALENT METAL CHELATE OF A VOLATILE CHELATING AGENT BOILING BELOW 300*C. AT 760 MM. PRESSURE AND SELECTED FROM THE GROUP CONSISTING OF 1,3-DIKETONES, B-KETOESTERS, AND AROMATIC O-HYDROXYALDEHYDES AND ESTERS, SAID METAL HAVING AN ABSOLUTE VALENCE N, BOTH M AND N BEING PLURAL INTEGERS AND TOTALING AT LEAST 5, THE AMOUNT OF (B) BEING SUFFICIENT TO REACT WITH AT LEAST 10% OF THE CHELATING STRUCTURES OF (A).
Claim 2
Dependent Claim
128 words
A SOLUTION FLUID AT ROOM TEMPERATURE, COMPRISING AS ITS ESSENTIAL INGREDIENTS, (A) AN ESTER HAVING A PLURALITY, M, OF HYDROXYL GROUPS ESTERIFIED WITH A B-KETOMONOCARBOXYLIC ACID HAVING HYDROGEN ON THE A-CARBON ATOM, THE ALCOHOL PORTION OF SAID ESTER BEING TAKEN FROM THE CLASS CONSISTING OF (1) POLYHYDRIC ALCOHOLS, AND (2) FREE HYDROXYL GROUP-CONTAINING POLYHYDRIC ALCOHOL ESTERS OF CARBOXYLIC ACIDS, AND (B) A POLYVALENT METAL CHELATE OF A VOLATILE CHELATING AGENT BOILING BELOW 300*C. AT 760 MM. PRESSURE AND SELECTED FROM THE GROUP CONSISTING OF 1,3-DIKETONES, B-KETOESTERS, AND AROMATIC O-HYDROXYALDEHYDES AND ESTERS, SAID METAL HAVING AN ABSOLUTE VALENCE N, BOTH M AND N BEING PLURAL INTEGERS AND TOTALING AT LEAST 5, THE AMOUNT OF (B) BEING SUFFICIENT TO REACT WITH AT LEAST 10% OF THE CHELATING STRUCTURES OF (A).
References Cited (Backward Citations)
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GB582899A
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US2615860A
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US2665265A
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US2693484A
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US2659711A
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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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |