US3630378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel water treating and storage apparatus
Assignee: Dow Chemical Co
•
Filing: 1968-05-24
•
Granted: 1971-12-28
•
Expires: 1988-05-24
Abstract
Abstract A novel water treating apparatus is disclosed having a unique capability of in combination treating and storing the treated water, supplying at instantaneous demand needs and at line pressure treated water and/or service water and continuously replenishing the supply of treated water without the need for elaborate or special timing devices, switches, valving arrangements, etc. The apparatus is especially useful in softening or desalting water by reverse osmosis, electrodialysis and the like.
Inventors
- 👤 William C Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
E; E03; E03B; E03B11/00; E03B11/02; B; B01; B01D; B01D61/00; B01D61/02; B01D61/08; B01D61/081; B01D63/00; B01D63/08; B01D63/087; C; C02; C02F; C02F1/00; C02F1/006; C02F1/44; C02F1/441; C02F1/46; C02F1/461; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
The apparatus of claim 1 wherein said reverse osmosis unit utilizes at least one uniplanar permeable membrane separatory element.
Claim 2
Dependent Claim
20 words
The apparatus of claim 1 wherein said reverse osmosis unit utilizes a multiplicity of fine, hollow permeable fiber separatory elements.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said reverse osmosis unit is a water softening unit.
Claim 4
Dependent Claim
15 words
The apparatus of claim 1 wherein said reverse osmosis unit is a water desalting unit.
Claim 5
Dependent Claim
99 words
The apparatus of claim 1 wherein the first and second storage vessels are combined into one vessel in such a manner that, in correspondence to the first vessel, the top portion is connected to the treated water exit of said unit and has connecting means to allow withdrawal of treated water and that, in correspondence to the second vessel, the bottom portion is connected to the waste effluent exit of said unit and has connecting means to allow withdrawal of service water; and wherein said combined vessel is connected from its central portion to the untreated water supply line.
Claim 6
Dependent Claim
19 words
The apparatus of claim 6 wherein said reverse osmosis unit utilizes at least one uniplanar permeable membrane separatory element.
Claim 7
Dependent Claim
20 words
The apparatus of claim 6 wherein said reverse osmosis unit utilizes a multiplicity of fine, hollow permeable fiber separatory elements.
Claim 8
Dependent Claim
15 words
The apparatus of claim 6 wherein said reverse osmosis unit is a water softening unit.
Claim 9
Dependent Claim
15 words
The apparatus of claim 6 wherein said reverse osmosis unit is a water desalting unit.
References Cited (Backward Citations)
US3505216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |