US3004590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple effect evaporators
Assignee: Individual
•
Filing: 1957-04-15
•
Granted: 1961-10-17
•
Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Curt F Rosenblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:23
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/26; B01D1/06; B01D1/065; Y; Y10; Y10S; Y10S203/00; Y10S203/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US945640A
Cited
GB144631A
Cited
US2076498A
Cited
US1942858A
Cited
US2159303A
Cited
US2764233A
Cited
US2769489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |