Patent US3288640A successfully refreshed from Google Patents.
US3288640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preventing, controlling, and removing alluvium in cooling water systems
Assignee: Calgon Corp
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Filing: 1965-01-11
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Granted: 1966-11-29
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Expires: 1985-01-11
Abstract
No abstract record available.
Inventors
- 👤 Howard G Flock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD OF REMOVING DEPOSITS OF ALLUVIUM FROM A COOLING WATER SYSTEM COMPRISING ADDING TO THE WATER OF SAID SYSTEM A POLYIMINE HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 POLYMERIZED FROM MONOMERS OF THE GENERAL FORMULA
Claim 2
Independent Claim
37 words
THE METHOD OF REMOVING DEPOSITS OF ALLUVIUM FROM A COOLING WATER SYSTEM COMPRISING ADDING TO THE WATER OF SAID SYSTEM A POLYIMINE HAVING A MOLECULAR WEIGHT OF AT LEAST 1000 POLYMERIZED FROM MONOMERS OF THE GENERAL FORMULA
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |