US3532161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate type heat exchanger
Assignee: Aqua Chem Inc
•
Filing: 1968-06-27
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Granted: 1970-10-06
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Expires: 1988-06-27
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Loebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:17
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; F28D; F28D9/00; F28D9/0093; F28F3/08; F28F3/083; F28F9/00; F28F9/02; F28F9/026
Claims Analysis
Total Claims: 0
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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) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |