US2964024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling the concentration of dissolvied solids in steam boiler waters
Assignee: Hagan Chemicals and Controls Inc
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Filing: 1956-11-06
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Granted: 1960-12-13
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Expires: 1976-11-06
Abstract
No abstract record available.
Inventors
- 👤 Charles E Kaufman
- 👤 William H Trautman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:13
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/06; G01N15/0656; F; F22; F22D; F22D11/00; F22D11/006; G05; G05D; G05D21/00; G05D21/02
Claims Analysis
Total Claims: 0
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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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |