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US2561762A
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Apparatus for reducing scale formation
Assignee: KONINK METAALFAB V H J N DAALD
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Filing: 1949-10-15
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Granted: 1951-07-24
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Expires: 1969-10-15
Abstract
No abstract record available.
Inventors
- 👤 Cornelis Hendrik Van Toorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:36
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/34; C02F1/36; F; F22; F22D; F22D1/00; F22D1/006; F24; F24D; F24D19/00; F24D19/0092; F24H; F24H9/00; F24H9/0005; F24H9/0042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246165A
Cited
US2376221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |