US3117944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coagula of colloidal fibrous boehmite and acrylamide polymers and processes for making same
Assignee: EIDP Inc
•
Filing: 1960-07-28
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Granted: 1964-01-14
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Expires: 1980-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert W Harrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:32
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A COAGULUM COMPRISING A CLLOIDAL, FIBROUS ALUMINA MONOHYDRATE HAVING THE BOEHMITE CRYSTAL LATTICE AND AN ACRYLAMIDE POLYER WHICH HAS A MOLECULAR WEIGHT OF ABOUT FROM 20,000 TO 2,000,000, AND WHICH IN THE ABSENCE OF THE ALUMINA MONOHYDRATE, IS WATER-SOLUBLE, THE ALUMINA MONOHYDRATE FIBERS BEING BONDED BY THE POLYARACYLAMIDE AND BEING SUBSTANTIALLY ORIENTED WITH RESPECT TO EACH OTHER.
Claim 2
Dependent Claim
57 words
A COAGULUM COMPRISING A CLLOIDAL, FIBROUS ALUMINA MONOHYDRATE HAVING THE BOEHMITE CRYSTAL LATTICE AND AN ACRYLAMIDE POLYER WHICH HAS A MOLECULAR WEIGHT OF ABOUT FROM 20,000 TO 2,000,000, AND WHICH IN THE ABSENCE OF THE ALUMINA MONOHYDRATE, IS WATER-SOLUBLE, THE ALUMINA MONOHYDRATE FIBERS BEING BONDED BY THE POLYARACYLAMIDE AND BEING SUBSTANTIALLY ORIENTED WITH RESPECT TO EACH OTHER.
References Cited (Backward Citations)
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Cited
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Cited
US2923693A
Cited
US2868753A
Cited
US2957821A
Cited
US2915475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |