Patent US2768958A successfully refreshed from Google Patents.
US2768958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloidal dispersions of heavy metal compounds
Assignee: Goodrich Corp
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Filing: 1954-04-08
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Granted: 1956-10-30
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Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 William D Stewart
- 👤 Joseph B Hoertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:04
CPC Classifications
G; G03; G03C; G03C1/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 0.001% TO ABOUT 1% BY WEIGHT OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE SALTS AND HYDROXIDES OF A HEAVY METAL OF GROUPS IB AND IIB OF THE PERIODIC TABLE DISPERSED IN AN AQUEOUS SOLUTION CONTAINING 0.05% TO 5% BY WEIGHT OF AN N-ALKYL BETAAMINO PROPIONIC ACID WHOSE ALKYL GROUP CONTAINS FROM 8 TO 14 CARBON ATOMS, SAID WATER-INSOLUBLE SALT BEING FORMED IN SITU, IN THE PRESENCE OF SAID N-ALKYL BETAAMINO PROPIONIC ACID, AS A TEMPORARILY STABLE DISPERSION OF VERY MINUTE PARTICLES WHICH INCREASE IN SIZE SLOWLY OVER A PERIOD OF FROM ABOUT 15 MINUTES TO ABOUT 40 HOURS BEFORE FLOCCULATING FROM SUSPENSION.
Claim 2
Dependent Claim
112 words
A COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 0.001% TO ABOUT 1% BY WEIGHT OF A MEMBER SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE SALTS AND HYDROXIDES OF A HEAVY METAL OF GROUPS IB AND IIB OF THE PERIODIC TABLE DISPERSED IN AN AQUEOUS SOLUTION CONTAINING 0.05% TO 5% BY WEIGHT OF AN N-ALKYL BETAAMINO PROPIONIC ACID WHOSE ALKYL GROUP CONTAINS FROM 8 TO 14 CARBON ATOMS, SAID WATER-INSOLUBLE SALT BEING FORMED IN SITU, IN THE PRESENCE OF SAID N-ALKYL BETAAMINO PROPIONIC ACID, AS A TEMPORARILY STABLE DISPERSION OF VERY MINUTE PARTICLES WHICH INCREASE IN SIZE SLOWLY OVER A PERIOD OF FROM ABOUT 15 MINUTES TO ABOUT 40 HOURS BEFORE FLOCCULATING FROM SUSPENSION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |