Patent US3408160A successfully refreshed from Google Patents.
US3408160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity reduction of alumina hydrate filter cake
Assignee: Reynolds Metals Co
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Filing: 1966-03-10
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Granted: 1968-10-29
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Expires: 1986-03-10
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Richard Lee
- 👤 Morgan John Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:10
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; C01F7/14; C01F7/144; C01F7/148; C01P; C01P2006/00; C01P2006/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
METHOD FOR REDUCING THE VISCOSITY OF ALUMINA HYDRATE IN THE FORM OF A WET FIABLE SOLID WHICH COMPRISES INCORPORATING IN SAID ALUMINA HYDRATE FROM ABOUOT 0.05% TO ABOUT 0.15% BY WEIGHT, BASED UPON THE DRY ALUMINA HYDRATE CONTENT, OF AN ACID VISCOSITY REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF (A) ALIPHATIC MONOCARBOXYLIC ACIDS CONTAINING FROM 1 TO 2 CARBON ATOMS, AND (B) MINERAL ACIDS SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC AND NITRIC ACID.
Claim 2
Dependent Claim
75 words
METHOD FOR REDUCING THE VISCOSITY OF ALUMINA HYDRATE IN THE FORM OF A WET FIABLE SOLID WHICH COMPRISES INCORPORATING IN SAID ALUMINA HYDRATE FROM ABOUOT 0.05% TO ABOUT 0.15% BY WEIGHT, BASED UPON THE DRY ALUMINA HYDRATE CONTENT, OF AN ACID VISCOSITY REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF (A) ALIPHATIC MONOCARBOXYLIC ACIDS CONTAINING FROM 1 TO 2 CARBON ATOMS, AND (B) MINERAL ACIDS SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC AND NITRIC ACID.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |