US2855363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water treatment
Assignee: American Water Softener Co
•
Filing: 1953-07-20
•
Granted: 1958-10-07
•
Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Kittredge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:41
CPC Classifications
B; B01; B01J; B01J49/00; B01J49/05; B01J49/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS OF REMOVING ALKALINITY FROM WATER COMPRISING CONTACTING THE WATER WITH AN ANION EXCHANGE MATERIAL WHICH HAS BEEN REGENERATED WITH SODIUM CHLORIDE AND SODIUM HYDROXIDE, THE RATIO OF SODIUM CHLORIDE TO SODIUM HYDROXIDE BEING WITHIN THE RANGE FROM ABOUT 10 TO 1 TO ABOUT 5 TO 1.
Claim 2
Dependent Claim
48 words
A PROCESS OF REMOVING ALKALINITY FROM WATER COMPRISING CONTACTING THE WATER WITH AN ANION EXCHANGE MATERIAL WHICH HAS BEEN REGENERATED WITH SODIUM CHLORIDE AND SODIUM HYDROXIDE, THE RATIO OF SODIUM CHLORIDE TO SODIUM HYDROXIDE BEING WITHIN THE RANGE FROM ABOUT 10 TO 1 TO ABOUT 5 TO 1.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |