US2595290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water purification
Assignee: Quinn Products Inc
•
Filing: 1946-07-25
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Granted: 1952-05-06
•
Expires: 1966-07-25
Abstract
No abstract record available.
Inventors
- 👤 David H Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:00
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/50; C02F1/505; B; B01; B01J; B01J47/00; B01J47/018
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
A COMPOSITION FOR WATER PURIFICATION CONSISTING ESSENTIALLY OF AN ADMIXTURE OF FROM 75 TO 40 PER CENT BY VOLUME OF GRANULES OF AN ADSORPTIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ACTIVATED CARBON AND SILICA GEL, FROM 10 TO 30 PER CENT BY VOLUME OF AN ION EXCHANGE SYNTHETIC RESIN AND FROM 15 TO 30 PER CENT BY VOLUME OF GRANULES COATED WITH A BACTERICIDE OF RELATIVELY LOW WATER SOLUBILITY SELECTED FROM THE GROUP CONSISTING OF SILVER CHLORIDE AND SILVER SULPHIDE SAID BACTERICIDE COATED GRANULES BEING SEPARATE FROM SAID ADSORPTIVE MATERIAL AND RESIN GRANULES AND SAID BACTERICIDE NORMALLY PRODUCING A CONCENTRATION JUST SUFFICIENT TO DESTROY BACTERIA DEVELOPING IN SAID ADSORPTIVE MATERIAL AND RESIN GRANULES DURING PERIODS OF NON-USE OF THE PURIFICATION UNIT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-06 | 1955-11-05 | 1956-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-06 | 1959-11-05 | 1960-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-06 | 1963-11-05 | 1964-05-06 | $7700.00 | Window Closed / Lapsed |