US3437580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrous metal oxide membranes and acid salts thereof
Assignee: McDonnell Douglas Corp
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Filing: 1963-11-29
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Granted: 1969-04-08
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Expires: 1983-11-29
Abstract
No abstract record available.
Inventors
- 👤 Frank C Arrance
- 👤 Carl Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:33
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J2325/00; C08J2325/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF MAKING A WATER-INSOLUBLE INORGANIC MEMBRANE, HAVING ION-EXCHANGE PROPERTIES WHICH COMPRISES THE STEPS OF: PREPARING A PARTICULATE WATER-INSOLUBLE HYDROUS METAL OXIDE CONTAINING MORE THAN ABOUT ONE PERCENT BOUND WATER AND CONTAINING LESS THAN ABOUT FIFTY PERCENT BOUND WATER OF THE TOTAL CAPACITY OF SAID HYDROUS METAL OXIDE TO BE HYDRATED; PRESSING SAID PARTICULATE HYDROUS METAL OXIDE UNDER A PRESSURE OF AT LEAST 2000 P.S.I., IN THE PRESENCE OF AN ADHESIVE, TO FORM A THIN MEMBER; AND HEATING AND CHEMICALLY BONDING SAID THIN MEMBER AT A TEMPERATURE OF BETWEEN ABOUT 150*C. TO ABOUT 500*C. TO FORM SAID MEMBRANE.
Claim 2
Independent Claim
99 words
A METHOD OF MAKING A WATER-INSOLUBLE INORGANIC MEMBRANE, HAVING ION-EXCHANGE PROPERTIES WHICH COMPRISES THE STEPS OF: PREPARING A PARTICULATE WATER-INSOLUBLE HYDROUS METAL OXIDE CONTAINING MORE THAN ABOUT ONE PERCENT BOUND WATER AND CONTAINING LESS THAN ABOUT FIFTY PERCENT BOUND WATER OF THE TOTAL CAPACITY OF SAID HYDROUS METAL OXIDE TO BE HYDRATED; PRESSING SAID PARTICULATE HYDROUS METAL OXIDE UNDER A PRESSURE OF AT LEAST 2000 P.S.I., IN THE PRESENCE OF AN ADHESIVE, TO FORM A THIN MEMBER; AND HEATING AND CHEMICALLY BONDING SAID THIN MEMBER AT A TEMPERATURE OF BETWEEN ABOUT 150*C. TO ABOUT 500*C. TO FORM SAID MEMBRANE.
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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |