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Patent US3558500A successfully refreshed from Google Patents.
US3558500A
Expired / Lapsed
US
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Method for the control of scale using n,n-dimethylamides of 18 carbon unsaturated carboxylic acids
Assignee: Buckman Laboratories International Inc
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Filing: 1968-02-07
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Granted: 1971-01-26
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Expires: 1988-02-07
Abstract
Abstract THE ADDITION OF N,N-DIMETHYLAMIDES OF 18 CARBON UNSATURATED CARBOXYLIC ACIDS TO AN AQUEOUS SYSTEM IS EFFECTIVE IN CONTROLLING SCALE.
Inventors
- 👤 Cecil George Hollis
- 👤 Richard William Lutey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:45
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |