US3763189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2-bis(carboxymethyl)-3-oxa-4-carboxy-4-hydroxy-butanoic acid lactone
Assignee: Monsanto Co
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Filing: 1972-03-29
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Granted: 1973-10-02
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Expires: 1992-03-29
Abstract
Abstract SALTS OF 2,2-BIS(CARBOXYMETHYL)-3-OXA-4-CARBOXY-4-HYDROXY-BUTANOIC ACID LACTONE REPRESENTED BY THE FORMULA (M-OOC-CH2)2-C<(-O-CH(-COO-M)-O-CO-) WHEREIN M IS AN ALKALI METAL OR AMMONIUM, ARE USEFUL SEQUESTRANTS AND DETERGENCY BUILDERS. THE ACID FORM OF SUCH COMPOUNDS IS A USEFUL INTERMEDIATE FOR THEIR PREPARATION.
Inventors
- 👤 R Harken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:05
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |