Patent US3562785A successfully refreshed from Google Patents.
Patent US3342728A successfully refreshed from Google Patents.
US3342728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desalinization of water
Assignee: Eastman Kodak Co
•
Filing: 1964-09-08
•
Granted: 1967-09-19
•
Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 Carl J Malm
- 👤 Martin E Rowley
- 👤 Nelson G Baumer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:43
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/02; B01D61/04; B01D61/025; B01D2311/00; B01D2311/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE METHOD OF DESALINATING IMPURE WATER CONTAINING SALT AND HAVING A PH ABOVE 7 IN WHICH METHOD ONE SIDE OF A CELLULOSE ACETATE MEMBRANE IS CONTACTED WITH SAID IMPURE WATER UNDER PRESSURE AND RELATIVELY PURER WATER IS COLLECTED FROM THE OTHER SIDE OF SAID MEMBRANE, THE STEP WHICH COMPRISES ADJUSTING THE PH OF SAID IMPURE WATER TO WITHIN THE RANGE OF 4.2-7.
Claim 2
Dependent Claim
63 words
IN THE METHOD OF DESALINATING IMPURE WATER CONTAINING SALT AND HAVING A PH ABOVE 7 IN WHICH METHOD ONE SIDE OF A CELLULOSE ACETATE MEMBRANE IS CONTACTED WITH SAID IMPURE WATER UNDER PRESSURE AND RELATIVELY PURER WATER IS COLLECTED FROM THE OTHER SIDE OF SAID MEMBRANE, THE STEP WHICH COMPRISES ADJUSTING THE PH OF SAID IMPURE WATER TO WITHIN THE RANGE OF 4.2-7.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |