US3386921A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gels and methods of producing same
Assignee: Kelco Co
•
Filing: 1963-04-25
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Granted: 1968-06-04
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Richard G Schweiger
- 👤 John J O'connell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:19
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084; A; A61; A61K; A61K47/00; A61K47/30; A61K47/36; A61K8/00; A61K8/02; A61K8/04; A61K8/042; A61K8/18; A61K8/72; A61K8/73; A61K8/733; A61Q; A61Q19/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF WATER, FROM 0.3 TO 3.0% OF A WATER SOLUBLE ALGIN ALKYLCARBOXYLATE HAVING A D.S. WITHIN THE RANGE 0.1 TO 1.1, AND A COMPOUND FURNISHING A DIVALENT ION CHOSEN FROM THE GROUP CONSISTING OF CALCIUM, ZINC, COBALT, NICKEL, COPPER, AND BARIUM AT A CONCENTRATION OF SAID DIVALENT ION OF AT LEAST 0.5 MILLIEQUIVALENT/GRAM OF ALGIN ALKYLCARBOXYLATE.
Claim 2
Dependent Claim
62 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF WATER, FROM 0.3 TO 3.0% OF A WATER SOLUBLE ALGIN ALKYLCARBOXYLATE HAVING A D.S. WITHIN THE RANGE 0.1 TO 1.1, AND A COMPOUND FURNISHING A DIVALENT ION CHOSEN FROM THE GROUP CONSISTING OF CALCIUM, ZINC, COBALT, NICKEL, COPPER, AND BARIUM AT A CONCENTRATION OF SAID DIVALENT ION OF AT LEAST 0.5 MILLIEQUIVALENT/GRAM OF ALGIN ALKYLCARBOXYLATE.
Claim 3
Dependent Claim
88 words
THE PROCESS OF PRODUCING AN AQUEOUS GEL MATERIALLY LESS SENSITIVE TO THE ADDITION OF DIVALENT IONS WHICH COMPRISES, ADDING TO WATER FROM 0.3 TO 3.0% OF A WATER SOLUBLE ALGIN ACETATE HAVING A D.S. WITHIN THE RANGE 0.1 TO 1.1 AND, WITHOUT RESPECT TO THE ORDER OF ADDITION, ADDING A COMPOUND FURNISHING A DIVALENT ION CHOSEN FROM THE CLASS CONSISTING OF CALCIUM, ZINC, COBALT, NICKEL, COPPER, AND BARIUM TO AN EXTENT SUFFICIENT TO PROVIDE A CONCENTRATION OF SAID DIVALENT ION OF AT LEAST 0.5 MILLIEQUIVALENT/GRAM OF ALGIN ACETATE.
Claim 4
Dependent Claim
88 words
THE PROCESS OF PRODUCING AN AQUEOUS GEL MATERIALLY LESS SENSITIVE TO THE ADDITION OF DIVALENT IONS WHICH COMPRISES, ADDING TO WATER FROM 0.3 TO 3.0% OF A WATER SOLUBLE ALGIN ACETATE HAVING A D.S. WITHIN THE RANGE 0.1 TO 1.1 AND, WITHOUT RESPECT TO THE ORDER OF ADDITION, ADDING A COMPOUND FURNISHING A DIVALENT ION CHOSEN FROM THE CLASS CONSISTING OF CALCIUM, ZINC, COBALT, NICKEL, COPPER, AND BARIUM TO AN EXTENT SUFFICIENT TO PROVIDE A CONCENTRATION OF SAID DIVALENT ION OF AT LEAST 0.5 MILLIEQUIVALENT/GRAM OF ALGIN ACETATE.
References Cited (Backward Citations)
US2420308A
Cited
US2589226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |