Patent US3085916A successfully refreshed from Google Patents.
US3085916A
Expired / Lapsed
US
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Method of removing and preventing accumulation in cooling systems
Assignee: ZIMMIE
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Filing: 1961-10-16
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Granted: 1963-04-16
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Expires: 1981-10-16
Abstract
No abstract record available.
Inventors
- 👤 William E Zimmie
- 👤 Jr Frederick W Bloecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:34
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; F; F27; F27D; F27D9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
A METHOD OF REMOVING AND PREVENTING THE ACCUMULATION OF MUD AND SLIT IN WATER-COOLED INDUSTRIAL HEAT-EXCHANGERS AND COOLING SYSTEMS, WHICH COMPRISES TREATING THE MUD AND SLIT BY ADDING TO THE WATER FLOWING THROUGH THE SYSTEMS ABOUT 0.1 TO 100 PARTS BY WEIGHT OF A WATER SOLUBLE POLYACRYLAMIDE PER MILLION PARTS BY WEIGHT OF THE WATER; SAID WATER PASING THROUGH THE SYSTEMS WITH SUFFICIENT VELOCITY TO CARRY THE TREATED ACCUMULATIONS; SAID POLYACRYLAMIDE HAVING AN AVERAGE MOLECULAR WEIGHT RANGING FROM ABOUT 100,000 TO 15,000,000.
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) | 1966-04-15 | 1966-10-15 | 1967-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-15 | 1970-10-15 | 1971-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-15 | 1974-10-15 | 1975-04-16 | $7700.00 | Window Closed / Lapsed |