Patent US3430690A successfully refreshed from Google Patents.
US3430690A
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US
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Centrifugal apparatus for heat exchange
Assignee: Alfa Laval AB
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Filing: 1966-11-03
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Granted: 1969-03-04
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Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Jean Sciaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:56
CPC Classifications
F; F28; F28D; F28D11/00; F28D11/02; B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D3/00; B01D3/08; Y; Y10; Y10S; Y10S165/00; Y10S165/135; Y10S165/139; Y10S165/14
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) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |