US3810882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and process for cross-linking macromolecular polysaccharide solutions
Assignee: Milchem Inc
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Filing: 1972-08-21
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Granted: 1974-05-14
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Expires: 1992-08-21
Abstract
Abstract A CROSS-LINKING AGENT FOR MACROMOLECULAR POLYSACCHARIDE MATERIALS CONSISTING ESSENTIALLY OF A CHELATING COMPOSITION FORMED FROM (1) AN ORGANIC POLYELECTROLYTE LIGAND COMPONENT, AND (2) A COMPONENT OF A METAL OF THE FIRST SERIES OF THE TRANSITION ELEMENTS OF THE PERIODIC TABLE. THIS CROSS-LINKING AGENT HAS BEEN FOUND TO PROVIDE ENHANCED RHEOLOGICAL PROPERTIES WITHOUT OBTAINING METAL ION OVERTREATMENT CHARACTERISTICS. IN A PREFERRED FORM, SAID CROSS-LINKING AGENT ALSO INCLUDES A COMPOUND CONTAINING A METAL FROM GROUP II OF THE PERIODIC TABLE. THE CROSS-LINKED MATERIALS MAY BE UTILIZED IN TEXTILE SIZING AGENTS, PAINTS, DRILLING FLUIDS, AND THE LIKE.
Inventors
- 👤 W Browning
- 👤 B Chesser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:45
CPC Classifications
C; C08; C08B; C08B37/00; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C09K8/20; C09K8/206
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |