Patent US3605883A successfully refreshed from Google Patents.
US3605883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Saline Water Conversion Corp USA
•
Filing: 1969-04-25
•
Granted: 1971-09-20
•
Expires: 1989-04-25
Abstract
Abstract A HEAT EXCHANGER HAVING A TUBE CONFIGURATION WITH A UNIFORM INSIDE DIAMETER AND PERIODICALLY PLACED THICKENED SECTIONS WHICH SERVE TO ELIMINATE THE REQUIREMENT OF SEALING DEVICES BETWEEN TUBES AND THE DIVIDER PLATES OF A MULTISTAGE EVAPORATOR, THEREBY SERVING AS A SEAL BETWEEN ADJACENT STAGES.
Inventors
- 👤 Robert Louis Nalbone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:06
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/22; F22; F22D; F22D1/00; F22D1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |