US3696044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequestrant compositions
Assignee: Zeneca Inc
•
Filing: 1970-07-02
•
Granted: 1972-10-03
•
Expires: 1990-07-02
Abstract
Abstract DISCLOSED ARE SEQUESTRANT COMPOSITIONS COMPRISING A MIXTURE OF (1) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF CITRIC ACID, TARTARIC ACID, POLYHYDROXY MONOCARBOXYLIC ACIDS CONTAINING FROM 6 TO 8 CARBON ATOMS, AND THE WATER SOLUBLE SALTS OF SAID ACIDS AND (2) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYHYDROXY DICARBOXYLIC ACIDS CONTAINING FROM 5 TO 8 CARBON ATOMS AND POLYHYDROXY MONOCARBOXYLIC KETOACIDS CONTAINING FROM 6 TO 8 CARBON ATOMS AND THE WATER-SOLUBLE SALTS OF SAID ACIDS.
Inventors
- 👤 Thomas F Rutledge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2086; C02; C02F; C02F5/00; C02F5/08; C02F5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |