US2943100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelation composition and method of making the same
Assignee: Ferro Pfanstiehl Laboratories Inc
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Filing: 1956-01-23
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Granted: 1960-06-28
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Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur G Holstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
C; C07; C07H; C07H23/00; C05; C05D; C05D9/00; C05D9/02; C07C; C07C51/00; C07C51/41; C07C51/412; Y; Y10; Y10S; Y10S71/00; Y10S71/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PREPARING A HEAVY METAL CHELATE COMPOSITION IN WHICH MORE THAN THE EQUIVALENT WEIGHT OF A HEAVY METAL IS COMPLEXED WITH AN EQUIVALENT WEIGHT OF AN ALKALI-METAL SAOD OF A SUGAR ACID CONTAINING AT LEAST 6 CARBON ATOMS COMPRISING REACTING IN AN AQUEOUS MEDIUM MORE THAN THE EQUIVALENT WEIGHT OF A SALT OF A HEAVY METAL AND AN EQUIVALENT WEIGHT OF AN ALKALI-METAL SALT OF A SUGAR ACID CONTAINING AT LEAST 6 CARBON ATOMS, ADJUSTING THE PH OF THE REACTION MIXTURE TO A PH IN THE RANGE OF 8 TO 14 AND THEREAFTER ADJUSTING THE PH TO A PH IN THE RANGE OF 4 TO 7.
Claim 2
Independent Claim
108 words
A METHOD OF PREPARING A HEAVY METAL CHELATE COMPOSITION IN WHICH MORE THAN THE EQUIVALENT WEIGHT OF A HEAVY METAL IS COMPLEXED WITH AN EQUIVALENT WEIGHT OF AN ALKALI-METAL SAOD OF A SUGAR ACID CONTAINING AT LEAST 6 CARBON ATOMS COMPRISING REACTING IN AN AQUEOUS MEDIUM MORE THAN THE EQUIVALENT WEIGHT OF A SALT OF A HEAVY METAL AND AN EQUIVALENT WEIGHT OF AN ALKALI-METAL SALT OF A SUGAR ACID CONTAINING AT LEAST 6 CARBON ATOMS, ADJUSTING THE PH OF THE REACTION MIXTURE TO A PH IN THE RANGE OF 8 TO 14 AND THEREAFTER ADJUSTING THE PH TO A PH IN THE RANGE OF 4 TO 7.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |