US3400754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for providing protection against scale formation on a heat exchange surface
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1966-09-20
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Granted: 1968-09-10
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Expires: 1986-09-20
Abstract
No abstract record available.
Inventors
- 👤 Barbu Bernard
- 👤 Huyghe Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F1/00; C02F1/02; C02F1/04; C02F1/042; F; F16; F16L; F16L55/00; F16L55/24; F28; F28F; F28F19/00; Y; Y10; Y10S; Y10S159/00; Y10S159/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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CA603783A
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US1557838A
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US2482262A
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US3019618A
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DE1060884B
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US3274752A
Cited
US3307616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |