US2928778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of water
Assignee: Individual
•
Filing: 1957-08-07
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Granted: 1960-03-15
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Expires: 1977-08-07
Abstract
No abstract record available.
Inventors
- 👤 Heathfield Patrick Heathfield
- 👤 Gow Henry Guthrie
- 👤 Richardson Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/46; C02F1/4606; C02F1/461; C02F1/46104; C02F1/46109; C23; C23F; C23F13/00; C23F13/02; C23F13/04; C02F1/4602; C02F2001/46133; C02F2201/00; C02F2201/46; C02F2201/461; C02F2201/46105; C02F2201/4611; C02F2303/00; C02F2303/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A METHOD OF PURIFYING THE WATER IN SEA WATER SYSTEMS FOR THE CONTROL OF BACTERIA AND INFESATIONS OF MUSSELS AND SELL FISH CONSISTING OF PASSING A DIRECT TELECTRIC CURRENT THROUGH THE WATER BY MEANS OF AN ALLOY ANODE CONSISTING ESSENTIALLY OF ALUMINUM AND ABOUT 3% BY WEIGHT OF ARSENIC.
Claim 2
Independent Claim
49 words
A METHOD OF PURIFYING THE WATER IN SEA WATER SYSTEMS FOR THE CONTROL OF BACTERIA AND INFESATIONS OF MUSSELS AND SELL FISH CONSISTING OF PASSING A DIRECT TELECTRIC CURRENT THROUGH THE WATER BY MEANS OF AN ALLOY ANODE CONSISTING ESSENTIALLY OF ALUMINUM AND ABOUT 3% BY WEIGHT OF ARSENIC.
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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |