US3503433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled recompression evaporator with regulated heating,feed and discharge
Assignee: Individual
•
Filing: 1966-09-07
•
Granted: 1970-03-31
•
Expires: 1986-09-07
Abstract
No abstract record available.
Inventors
- 👤 Pietro Riva
- 👤 Guido Riva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:59
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/06; B01D1/0082; B01D1/28; B01D1/289; B01D1/2896; Y; Y10; Y10S; Y10S159/00; Y10S159/01; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |